You might want to take a day trip to Porters RV Sales in Williamston SC. THey have a huge lot of used only and every rig is unlocked! No salesman follows you around, they just give you a print out of the rigs and prices. They have everything from truck campers to massive Class A's and all manner of RV's in between.
It's a great way to get a fast education. You can learn what you like and dislike and come up with your short list of "must haves" and long list of "wish haves".
If you want to see all their rigs, plan to arrive early in the morning. Every dealer should take lessons from this place. Their website is lousy (not updated enough) but the lot itself is awesome. They even provide golf carts if you can't walk much.
Last time I was there, I toured all morning, ate lunch then toured the rest in the afternoon.
Well worth the trip and not that far from you, well um, depending on which side of Georgia you are on.