Most EDC(Every Day Carry) knives are sufficient for most of what would come up camping. If you're going to carry anything bigger a hatchet is a lot more handy.
That said if you're looking for something decent Benchmade, Spyderco and Buck all make solid knives. I'm partial to Benchmade mostly because their locking mechanism works with a single hand in a way that doesn't put your fingers in the path of the blade and can be used with gloves.
535, 970 and Griptilian are all fantastic knives that will take a beating and are easy to carry. I have a 535 that I use on the farm and is more than strong enough for anything I throw at it.
A knife that you have on you more often and easy to carry is better than a heavier or larger one. Some blade lengths are also illegal in certain cities so staying under 3" is a good idea. I usually carry a light pocket knife, flashlight and small-ish multitool which covers most of the bases.
I would get a completely separate knife for food (one to open the marshmallow bag, another to make the stick pointy).