Good luck with your search. I personally know my limitations and puppies are best for our family. We have a system, I always have two dogs at a time. The old dog will teach the pup. I never have to worry about housebreaking! Anyhow, in your situation: I would really be careful about bringing home a dog with issues. You'll have to rely on the shelter/rescue people to do a careful evaluation of the dog's behavior. It is a very noble endeavor, but really should be left to the experts,(IMO).
As far as campgrounds go: many do have breed and weight,(usually under 35 lbs.) restrictions. I like big dogs and travel just fine. Just check ahead before you go. State parks in Ohio are great! Make sure no matter what size/breed that you get-they had better be bullet-proof socialized. No barking, no snapping, no unsupervised pooping, etc. Dogs, kids, dog-haters in close quarters means that the dog will get blamed for every little thing.