You have my permission to overload your truck if you want to.
There are probably 20 Lakes within 30 miles from our house each with multiple campgrounds. I see thousands of trailers heading out every year. Most are overloaded by way more than 100 pounds but are headed to one of these spots. I see fifth wheels being pulled by half tons trucks with a bass boat behind the trailer. I don't remember ever seeing one blew up on the side of the road. A flat tire once in a while. They just jack it up, change it keep going.
Lots of these would have problems if they hit the interstate heading cross country. That is a totally different game running down the road at interstate speeds for several thousand miles. Yes I think the tow vehicle would know the difference or it will figure it out pretty quick.
Just my opinion but I was raised on a farm where pickups earned their keep by hauling big loads for short distances. My dad used to joke, don't worry about the mules, just load the wagon.