We bought a used 5th wheel last year and still have much to learn. Where we plan to camp for several weeks later this year, there are no hookups and generators are not allowed. However, while camping we travel about (sight seeing, etc.) much of the day in our tow vehicle. I hope to be able to put the batteries in a secured box in the bed of the truck, connect them to the trailer plug, and charge them from the truck while driving around. I haven't found the definitive answer as to whether or not this will work. One of my main concerns is that I don't run down the truck batteries. Any help would be greatly appreciated.