Canoe

I have pulled a pop-up and canoe from Ohio to the Pacific northwest twice, from Ohio to florida many times and all over the states adjacent to Ohio since 1990. I have used the same set of foam blocks I bought with the canoe in 1990. I have NEVER had a problem. I just tie the boat down firmly using a strap to the front and one to the back and get on the road. I use the same set of blocks on the car and the mini-van. YMMV