Also keep in mind that you lose approx 3% power for every 1k in elevation. So while a 3.5k generator will handle a 30amp trailer (AC, fridge, ect) at 4,000 feet, at 10,000 feet you're screwed. I went camping last year at 11,000 feet, and the 3.5k generator I had was putting out 2.3k, and running...