In my experience, if you are camping with hookups, the converter is constantly charging the batteries, so a good heavy duty RV/marine batteries will hold up just fine, but the build quality of the optima blue tops is awesome. I use red tops in my rock-crawling Jeep, and will switch the LM over to blue tops when the dealer installed batteries give up the ghost.
Another thing to remember is the AGM batteries require a different charging "brain" with some of the charge wizard systems.