There are many
past threads on this subject, each containing pages of discussion and experiences. Grab your favorite beverage, and sit back for an hour of more of reading.
I will state that you should avoid "construction generators" for RV/camping use. They are very noisy, and that annoying sound carries a long way. I am speaking from experience. Remember how far away you can hear a chain saw cutting? Same thing.
Personally I like the performance of my
Boliy inverter series generator. I've used it since 2008 to power our 15,500 BTU heat pump and microwave at the same time. If it ever dies, I'll buy another. The new ones are electric-start.