I wonder how our parents managed to cook without a microwave or their parents who in many cases did not not have electicity or propane or gas. And they were not even "camping" just trying to get by.
When we have 110AC we use the microwave. When we do not have AC we use the stove top. Only thing we forego is popcorn which is hardly a big deal.
When I researched "RV" microwaves it became apparent that these were standard microwaves that had a front grill for mounting but were actually lower quality for the price than a counter microwave one could buy at Home Depot or Lowes or Costco.