Everything but the roof air. I would only run the microwave, TV and any other large draw item like a coffee maker one at a time. You might be able to start the roof air as it draws 16 amps at startup and then 12 amps running but you might burn up the motor if you run anything else. Thankfully the days where campgrounds only have 15 amp circuits is pretty much gone. Now a days most have 30 amp or 30/50 amp in all the sites except the tent sites. If someone tried to assign me a 15 amp site, I would thank them for their time, then leave and go to another campground.