Here's a tour I've been thinking of for 2013. Train Vancouver BC to Jasper Alberta, ACA Great Parks route Jasper to Whitefish MT. Then depending on how everybody feels and time constraints (not all of them are retired) either train or NT back to Seattle.
There will be from two to six riders. All will be physically up to this or they can get back on their own. This sounds harsh but I've known them all for decades. I don't want to camp.
Is there anything to be gained from group rates on railways, in hostels etc.?