I would imagine that since the chassis has a house built on it's back, that weighs it down quite heavy to begin with. So it is already towing (carrying) a heavy load. Pulling the added weigh of a tow vehicle would be just a bit more.
When we bought our PC back in 2007, I drove it home 170 miles with Irene following me in our car. Then we went on a weekender adding around 200 more miles, then started towing a 2100 pound MR2 for many thousands of miles.
Driving home from the factory while towing, I think if you take it easy, you will do yourself good service. If you are traveling with someone, have them drive the tow vehicle separately for the first day back home. Something is better than nothing. It may also make a difference driving in scorching 100 degree heat compared to 80 degrees. Some of the break-in might be related to the running temperature of the engine.