If you drive smart, you can more than save the increase in gas prices with efficiency. Most people that drive my size RV (a 33ft class A with a Ford V8 460) get about 5-7mpg. If you limit your speed to 50 mph on the highways and time traffic lights so you don’t come to a full stop, start slowly, etc., you can get the 12 mpg I got on a trip.
Works with cars/trucks pulling a trailer too.