Good Day Eh!

I'm also a Canadian from North Van

I've been piecing together a route from Williams Lake through Churn Creek, to Yalakom, to Shulaps, to Spruce Lake, to Goldbridge, to Pemberton, to Whistler to Squamish.  Have done many portions (but some in the wrong direction).
Do you think it would make a good bike packing race route? 
It would be fairly technical for a bike with 15 to 20lb of extra gear.
Figure 4 to 5 days racing, and 7 days touring.  Churn Creek to the Yalakom would be very remote, but mainly ranch roads with some horse trails (haven't figured out a creek/canyon crossing yet).

Also could do Yukon to Vancouver. 
There is a railbed (never any rails) from Dease Lake to Fort St. James.  not sure of the state of bridges or washouts, but heard at least part of it is a 4x4 or ATV route.  Likely 3 to 5 days without supply for that portion.

fall works better for me, but next year