If your RV has an adequate hitch -and- if your electrical inlet is nearby, you might consider my solution.
My link (link looks the same to me)
Bud's link (copied from his post below)
I give up. I can't get this image to display.Note the input at the rear of the trailer. Note the input cord on the tray. I can run the 15K AC while driving down the road. I only do so in the heat of summer to cool off the trailer about half hour before arrival at campsite. The generator is a Honda 3000. It provides 30 AMP power to every outlet in the trailer, with the usual constraints of a 30 amp supply.