V.P.
At cub scout camp, I see everything -- from cots to air mattresses. To me, it's one night, and I don't want to lug a ton of things there. There are pads you can get that are just a little thicker than a yoga mat that help smooth out bumps. I would never carry a cot or an air mattress.
By the way -- air mattresses and cots are colder than just being right on the ground since the air circulates under you -- it's warmer just to be right on the ground (but then again in TX, it might not matter!)
Here's a tip, though -- unless you're pulling right up to the campsite (which you probably aren't) take along a wagon to carry things from the car to the site. And remember, if it rains, keep everything, including fingers, away from the walls of the tent. One time my daughter woke up with a wet sleeping bag because she was pushed up against the wall of the tent.
Have fun!