Tow vehicle registration

Paying for a single GCWR plate might make sense if the tow vehicle is always towing some trailer, otherwise it is better to pay for GVWR on each tow vehicle and trailer. My truck tows 75 percent of the miles I put on it but my other vehicles tow less than 10 percent of their mileage. I could see GCWR being an advantage if you have multiple trailers but just one tow vehicle...