Over charge batteries?
Schoolhouse, I see your learning the RV industry doesn't care if you want a hassle free system. They could care less about your happiness.
If you want to fix your problem you have to spend a little money and then you can go do your thing with not a lot of worry, but with a little maintenance on you. You miss understood the boys I believe. Its not a lot of money to fix what you want.
We have full time only three years and do a lot of moving about. Heard many horror stories about the equipment they install on RV's and how converter/chargers have there issues. We installed the necessary equipment and killed the breaker on the original converter/ charger but if the other charger fails all we have to do is flip a breaker and have it back till we fix anything broken. Just want to suggest that spending a little money will fix your problem and then its travel on with no worries.
Enjoy these days and be happy. These RV's can make us go crazy if you let them. We fixed our so it makes us happy. Once again enjoy the lifestyle and see ya down the road.