Teachu2, I'm headed in that direction as well. I think having a retractable extension cord in the trailer that I can flip a receptacle cover open on the outside of the trailer, extend the cord out, and plug in will be easier than going into the garage each time and running an extension cord out to the trailer. Plus, the extension cord will always be in the trailer for use at the field during the big fly-ins.

Why did you seal both sides of the trailer wall? Both sides open up for the cord to pass through, right? Do you feed the cord into both the boxes each time?

Josh