Thanks folks for the speedy advice!! My dad just turned 60 and certainly isn't in the best shape. He isn't the type to exercise daily, but he does start a program prior to the trips to prepare himself. I'll see if I can get him to start exercising, just for his own good let alone the trip.  Oh, one more thing. He doesn't want a short trip lol. He likes his 10 days in the wilderness, but likes a little bit of a slower pace. I'm willing to do the extra work to make it fun for him to see new places and not work as hard so that he can enjoy himself. Mad_Mat, the trip would be late summer/early fall.

Thankfully I still have a lot of time before the trip to plan things out, but I'm just trying to get a feel for where I should start my planning.