First time buyer, I need some help in choosing!

I think you will like an A better than a C for a lot of reasons. Short A's like mine are not hard to drive, but take some getting used to especially backing and some right turns. But so are C's. Since you plan to boondock a lot you will want to look for larger holding tanks, and at least the ability to have multiple batteries for the house side of things. Since you will be buying used, try to negotiate new tires, and make sure roof has been recently sealed and check for signs of leaks.