Hey Mike,
I can definitely do the Idaho City portion of the trip with you.
We can take my truck and new truck camper - sleeps two very comfortably and it has toilet, shower, heat and AC. I can tow my 6 X 10 enclosed wells cargo behind the truck/camper combo with a short extension on the hitch. I have a nice pop-up to take along.
I am toying with the idea of doing Missouri with ya too - but man that's a long way to go. The thought of it made me start working out in the gym at work - so it can't be all bad...
jeff