generator and gas mileage

Does anyone run their generator while driving and if so how does it affect your fuel mileage? We are planning a

trip to florida in august.

First of all I feel for you. Driving in a MH in Florida in the middle of their hot summers is brutal at best. :B

Do yourself a favor and pick up a bunch of van windshield shades and put them in your cab over window and side windows when traveling. That will bring the temps down inside your MH about 20 degrees. And cover your roof vents with those pillow inserts again helps to keep the heat out.

Regarding your mpg question:
I think it is a push when compared to running the dash air which actually is harder on your engine in hot summer heat in the southern states. I don't use the dash air that puts the compressor on, etc. Drops your mpg and heats up your engine.

I have a gas gen and when I first started out and really cared about what mpg I was getting I found it to be the same as when you are running your dash air.

Take just one trip in your MH driving in the southern states during their summers and you won't care if you are only getting 2 mpg with the coach air on! :B