Most everything I would personally use a knife for involves hunting, fishing or cooking.
My personal vote would be for a field craft type knife, a fishing knife, a folder or possibly a survival knife 
I think you're on the right track there.  But let's take it a little further....
How about a 
Small Knife Field Set!!!  - Stout 2.5-3 inch triangular skinner w/gut
- Thin 3-4 inch caper/paring knife
- Thin 5-6 inch fillet. 
All in a nylon or leather combo sheath or pouch
Can I hear some oooo's and ahhhh's?