One, check to confirm voltage at campground post. Second, you noted the breaker above the bed ok, how about the other breakers, because all 110 volt goes thru this panel to the entire coach.
Third, check your inverter to confirm all fuses / breakers are ok. If you have a 2000 watt inverter there should be three pop-out fuses. Make sure they have not popped out.
If all the above is ok, you may have an inverter problem. A lot of Safaris were equipped with Heart Interface Inverters, and they are known to have some problems.