Welcome to the real world of RV and mucho $$$$$$. I stay in RV parks also but coming and going a couple of nights along the highways and biways. LEDs are important. If you expect to use the furnace and everything else you need 12 volt power. Open the wallet and buy four 6 volt golf cart batteries. You are looking at $150 each. Problem solved and empty wallet. RVing isn't as cheap as many think. Even the most smallest TT uses 2 batteries. These batteries should only be drawn down 50% to extend battery life. It is hard to believe any 5ver would come with one battery. JMHO.
