We have stayed many nights over the years at places like W M and Crkr Barl. At an estimated half gallon per hour, we saved a lot of money by skipping the campgrounds those summer nights. At current average gas prices, running the A/C and the genny will cost us $30-35. In some places, like state parks and COE sites, we can stay cheaper than those free concrete overnights with the genny.
If we could just get to somewhere with higher altitude or higher latitude so we could get by with a fan, we would be back to boondocking off and on.