Thanks so much for all of the replies. After some thought, I think I'm simply going to move down to just 1 deep cycle battery. Now that I've gotten a bit older and my boys are grown, we never...and I mean NEVER dry camp anymore. Camping for us means going to RV parks or State parks with hookups or tailgaiting for football games with the generator running all night.
I feel great about this decision, because believe me, fitting (2) Group 27 batteries into my battery box is HELL!!! It's just not made for it.
My final questions for you guys. Do I need to reprogram the converter or do anything to the coach if I move down to 1 battery? I wouldn't think so, but I thought I'd ask. Also, is there any benefit to purchasing a Group 31 over a Group 27 deep cycle battery, or are the differences negligible?
Thanks again everyone!!