Towing boats can sure put you into some high numbers pretty quickly. Just the trailers can weigh quite a bit. I can see wanting a heavy duty truck for a lot of those costal boats even if technically some 1/2 tons could do it. You don’t want to be towing near your limit very often.You are correct. They are mainly work trucks on the side of the road. I was also very surprised by the lack of midsized trucks. I did count five Tacomas on the ride back and two Mavericks. I think part of the reason for the number of full sized rigs is how many were towing boats. Big ones with expensive outboards.