It looks like it's legal in my state of KY as long as the total length is no more than 65'. I am considering pulling my 16' Lowe Big Jon aluminum boat w/trailer hitched to the back of my pop up camper. My tow vehicle and camper are in my signature below and I have NO trailer brakes. I would need to rig a 1 7/8" ball hitch onto the back of my PUP to make it happen plus wire in a plug for the boat trailer lights. I am an experienced driver with a trailer in tow and I understand that I won't be able to back up with two trailers attached to my tow vehicle. Has anyone on here ever done this? If so, do you have any tips or recommendations for this type of setup? Thanks in advance.