I'm looking for a 3-7 day river run I can do with my dad, either guided or by ourselves. We're willing to go anywhere in the US and Canada, and probably run anything up to a class 2, maybe 3 (or run rivers with rapids that are easy to line the boats down), or we could do a long stretch of flatwater.
My dad, who is a healthy 57 yr. old, had two vertebra in his c-spine removed in 2007 so he has limited ROM in his neck and increased mechanism for spinal injury as a result. I want to do something remote and physically challenging to give him that experience, but also be in a situation where I can still mitigate SOME risk (thus the upper limit on rapid difficulty).
I've done a bunch of flatwater expeditioning in the Everglades/10,000 islands, I've been open boating whitewater in the WNC area the last 4 years, and I've done a 7 day self-supported expedition on the Rio Grande last year, so I feel comfortable planning something that could be logistically complex.
I've been working full-time for Outward Bound the last 4 years and I just got married, so I haven't had much time to spend with my father, and I want to get something truly memorable in before life circumstances limit our ability to do things like this.
If anyone has a guide service they would recommend, I'd be up for that too. My father likes to rough it, but guides typically offer a bit more amenities that I'm sure he would appreciate

Criteria:
- scenic river run
- maximum of class 3 rapids (if higher, than with a reasonable portage or lining option)
- remote/backcountry feel
- U.S. and Canada
- can be with a guide service.
- flatwater or whitewater river
Thanks all! Links to resources are helpful too!