New to Idaho and whitewater rafting.

After taking 12 trips this summer (payette, S.boise, salmon) with friends in various types of crafts.I,ve decided i gotta have a boat. but what type?

Requirements:
Ability to take 3 passengers on day whitewater trips, class III/IV water.
Ability to take 1 passenger and camping gear on 5 day trip, class V water.
Ability to fish (back troll/ fly) rivers.
Ability to portage/load myself.
Ability to mount electric trolling motor on boat, which would allow fishing on lakes/ponds.

I'm I asking too much from a single craft? Will I end up with something that does nothing well.
Boise area  
Thanks Paul