Thanks Alpamayo.
The Trans Am looks good.

While I have completed a coast to coast ride a decade or so ago, today there is a good deal more tweeting and/or other driver distractions 'out there.'
Hence, while giving thought to doing another coast to coast, this time I may only have the nerve to do it on the lowest possible traffic trails and roads.
My preferred Atlantic Ocean connecting point would be somewhere in the southeastern US.
Anyone got any thoughts for me on this notion?
- Many thanks.
P.S. I am aware of the Adventure Cycling Association well documented maps; however, they are not always the lowest traffic routes, and many times they tend to stay on pavement .... I would gladly be on dirt to avoid traffic ... they way traffic has gotten to be today.   Maybe I should be looking at the American Discovery Trail (?); however, while it offers remote routing it is designed to connect urban areas to urban areas.  Need advice.

If y'all do ride the Cohutta-Cat (or even if you do not !  ) I hope you'll seriously consider submitting it for approval as an official BikePacking.net route via ..... http://www.bikepacking.net/routes
- Many thanks.
P.S. Another, tho shorter and newer (opened June 2018) off road, which may easily fit into a weekend schedule, is in the vicinity of Yonah Mt. GA (n/e GA) ....
https://www.mtbproject.com/directory/8020926/yonah-preserve

Is the Trans North Georgia happening this summer?

Don't know about Wisconsin, but welcome Mark

[bike packing]

In SUMMARY: While there are favorable factors (enumerated below) about running 26”x 1.75-.95” solid tubes I would not do it again due to the difficulty of removing the tubes from the wheels.  The fit was so tight that I had to saw and cut the tubes and tire casings to effect removal.

In DETAIL: For my utility/tester/around town ATB (hardtail) I had to try the non-pneumatics first hand to find out if they would really work. 
I kept seeing them at Walmart for $20 (now only $18) each and my curiosity eventually had to be served. 
Four years ago I could find little to zero information posted from cyclists, pro or con.. 
My eventual interest was for long distance bike packing and not having to be concerned with the extra tubes/pumps, not to mention the impact of unplanned flats/tube failures.
I have always been able to minimize flats with tube liners, but have not been as fortunate with tubes splitting and valves failing, no matter how much I pay for the highest quality pneumatic tubes that I have been able to find.
Here is what I learned from using solid rubber/non-pneumatic inner tubes (Walmart.com: ‘Bell 26" Solid NOMORFLAT ‘) -
1.   Not too hard to mount, though it did require soapy water as specified by Bell.
2.   Ride was softer. Below 55 degrees F. one of the wheels emitted a slight squeaking noise.
3.   Rolling resistance seemed to be less than or equal to 15%  greater subject to ambient temperature.
4.   Weight was probably a pound or so heavier for each wheel compared with heavy duty air tubes with liners.
5.   Really liberating to know one could not have a flat tire no matter where the ride/expedition took me.
6.   Tire treads wore out 3 times faster.
7.   As per above, nearly impossible to remove when I did need to change to new tires.

LIMITS OF 'LEARNING:'  Because I never took them on an expedition/tour what I never did learn was how well they would hold up to the stress of days on end under a fully loaded rig, but I thought I should ‘report in’ per the above on that which I did learn.  Have any of you been out there on the 'back side of no where' with solid tubes?
 

Has anyone ridden this route recently? Are the Que Sheets fairly viable? Thx. This route is a dream come true for me if it is even near 'functional.'  If it is not, I want to work with others to help bring it up to an operational status.

[MarkMyWord]

MarkMyWord - The American Discovery Trail ( http://www.discoverytrail.org/ ) runs nearby you from the Atlantic to Pacific and the aforementioned C&O Towpath, you will find, is part of it.  Heading west, it drops s/w out of Cumberland and gets more challenging thru some remote parts of WV on its way to Parkersburg.
 

Yep...will post if I ever have the nerve to do any multi-day expeditions with them.   Meanwhile, still have them on my utility/trainer rig..... they continue to operate 'without incident,' meaning no known time that they tried to come off (Alert: I am not riding aggresively).   My hesitation is that a fully loaded bike is different than just running light on a trainer.....and the heavier weight wheels work fine for fitness training.  Only added observation after 3 years since the first posting of this inquiry - They wear out knobbies faster (guessing a 25% faster rate).

[1.]

Just starting the research phase of this project now, and really looking forward to it.

Thanks in advance for the work you are doing on this.  I may be able to help with data on some of the sections (some I have ridden/some I have only studied, tho 'studied' extensively):
1.  C & O Tow Path  (DC westward to beyond Cumberland, MD).
2.  From "1.," above, across WVa, westward, to Ohio (some of this is the Northbend Rail to Trail; some is thru the Monongehela Forest).
3.  Katy Trail/Lewis & Clark Trail (St. Louis westward to Kansas).
Fred/Atlanta.

[FD]

FD - Worthy consideration.. they are heavier - I do not know how much.... I just keep forgetting that fact cause I am lighter due to no extra tubes, I would not be packing two pumps (even the best quality pump can fail out there)... and I do not have to be concerned about what I am bounding over top of.  Still your point remains important to me  due to wheel weight being different, with regard to handling, than pack weight.

[Has anyone run them for long distances and multi-day trips on the back side of nowhere?]

I have loaded a pair of the WalMart Bell No-Mor Flats on my tester/trainer rig and have used them now for about 2 months, 3 one hour rides per week.... true they do not ride 'crisply;' however, they work and I need not take 2 tubes and a pump.  Has anyone run them for long distances and multi-day trips on the back side of nowhere?

I am developing (slowly) enough data on this route to start riding more sections (have completed some links in mid-USA, so far)... the route is completely in place, http://www.discoverytrail.org/ , tho not consistently well documented ..... a great deal of it is off pavement.  Thanks in advance for any advice and insights.

[fully]

Given a fully loaded rig, decent weather, multi-day trip & I am 'on in years.' -
Paved (< so as to not introduce surface variables) flat I go 50 miles.
ALL up hill ( i.e., > 4% grade), ALL day (e.g., Blue Ridge Parkway/Skyline Drive or North Cascades) I go 25 miles.