We dry camp in the Smoky Mtn national park for 2 weeks at a time. We have a single 12V Trojan SCS 200 Gr 27 battery that we recharge every morning with a Honda EU 1000 during breakfast and morning cleanup. Typically a couple of gallons of gas gets us through our stay. We do not have (need) an inverter but do run the ceiling roof fan all night in the summer or the furnace in the morning in the fall. All lighting is led and the other loads are the water pump,fridge and water heater electronics and radio. Solar would be useless where we camp due to the dense tall trees and frequent rain. I do use a solar panel at home in sunny TX to maintain the battery when the trailer is not being used. We camp on loops where generators are allowed and most use quiet type generators that are barely audible by the next adjacent camp site. There are a few who run loud contractor type generators and you can hear them all over the loop.