ISTR a photo where the trailer was in a meadow and the panels were too. I don't know if it is an option to put the trailer over in the shade if any and leave the panels out there.
Then the new plan was/is to put the panels on the roof of the trailer. Would that provide enough shade for the trailer so it didn't get so hot?
Dogs? There's the rub! We got the Honda 3000 in the first place in case we needed to run the air conditioner for the dogs. We are ok with a fan or two, but not the dogs if they have been working. In fact, at events they have a water tank you can toss your dog into if needed. Stupid dogs will keep going in the heat till they up and die of it unless you step in. All focus on the job and no common sense!