You should have a dash A/C also just like a car. Depends on the temperatures, but many times we are able to travel using just the dash air. If it is too warm for that, then just start the generator and turn the house A/C on. We have a gas motorhome and the generator runs off the gas in the gas tank of the motorhome. It will not operator if you have 1/4 tank of gas or less. A safety to keep you from running out of gas. We use gas buddy to find the best gas prices, and start looking for a station in our upcoming towns once we get to 1/2 tank. We check the layout of the station on google maps, satelite and street views so we know if we can get in and out. We try to use the end pumps