yeah did one across the rockies about 8 years ago so it could well have changed a lot by now but all i will say is you dont get much time to yourself and the success/enjoyment of the whole thing depends totally on the others on the bus : )
i am just the kind of person who prefers to have freedom and no timetable - - but if you like others doing the organising for you then youd enjoy it probably
have you condidered hiring an rv and doing that kind of holiday?