Dual Generators (not dual fuel, but two generators)

My Honda 3000 EU run on the tank 12.5 hr with 15k AC-on all the time.
That was at Sacramento River, where AC did not get time off.
That thing is so easy to pull-start that I never filled up starting battery that come with it 10 years ago.
I can't imagine refueling 2000's every 2 or 3 hr in 110F heat.
You better don't keep them close to RV as at those temperature any drop of gasoline on exhaust ends in major forest fire.