You'll see at least some of them, but many will only be a quick blur and wave. My experiences from this past year indicate that many people were good for 1 - 3 minutes of chatting and then wanted to get moving on.
I talked with most of the leaders who were interested in the snow situation further south in Colorado ( it was all melted but had been a problem a couple of weeks earlier for some ITT folks ), then there was a whole bunch of folks in the middle who waved and kept on going, then there were the folks toward the end who would chat for a while, and you get to talk to quite a few touring riders as you get further north.
New Mexico was great in mid June, nice and dry, pleasant nights ... there was some wind in WY as the route tends sorta northwest and you catch some westerlies, and things were dry for me until Lincoln and a bit of Canada.
Banff was pretty cool for a place to end up. Just have to remember to wash the bike before the shop boxes it up .... there's a couple of check boxes on the Customs Declaration form about "bringing soil into the US" and "have you been on a farm or ranch or around livestock ?" With a muddy dirty bike in a box that had two thousand miles of cow shit on it, that had me worried in the Calgary airport :-)