Kentucky Caving and Seeking Class "A" Advice

On our way home from North Carolina we stopped at Carter Caves State Park for 2 nights.  Like all Kentucky state parks the campground sites are a little tight for my liking, but there were a few sites that were spaced fairly well in the 70's and 80's section of the loop and we were lucky enough to get one of them.  I forgot to take a picture so if you want a look at the park check out their link.  Of course once the weekend crowd cleared out it was plenty roomy.

While we were there we decided to check out a cave tour.  Wayne gave it a pass at the last minute due to the reported "tightness" of the cave, but Cory and I were game.

As cave tours go there was very little walking or climbing, but a lot of standing around while the guide talked.  I'm all for learning about cave formation, but standing on stone for long periods of time not so much.

The reported tight spot was a passageway shown above, and it wasn't so bad, just had to turn your shoulders as you went around a bend.

Cory enjoyed the cave tour and we talked about taking more trips to see caves.  I wonder if he'd like the ruins in New Mexico too?  On that topic, we are all also talking about taking the plunge and buying a Class A within the next year.  I could drive a Class A without Wayne for trips with Cory and Wayne's easily injured back could get a break from dealing with the hitch.  We are also looking at vehicle options.  Wayne wants something that we can tow behind the Class A in neutral like a Grand Cherokee or Wrangler 4x4 but I'd like something more fuel efficient.  Any advice on this whole subject much appreciated!!