We bought a Harbor Freight Predator 3500 to use for camping this past summer before we took delivery of our Lariat ER. It's worked well so far to power rental campers and is nice and quiet. It will also fit in my bed with the tonneau cover closed for transport for a couple trips we have planned next year. I don't plan to charge the Lariat with it. It would take too long, and I'd probably become an internet meme real quick while camping at a couple NASCAR events.
We plan to rent campers that are not too far from our destinations next summer to reduce towing distances. Once we get set up. we'll recharge at some off-site DC chargers. I plan to try running the camper from the truck just to test it out but will probably stick with the generator for the most part. Looking forward to the learning experience.