My buddy took his raft rigged over Cameron pass (10,000' and change) and by the time he got to,the top, the boat was bulging against the straps, frame and trailer. He let out some air, and by the time he was at the bottom on the other side, some of the straps were starting to fall off. That night, the temperature dropped quite a bit, and the boat as 1/2 full or less, and all the straps were hanging off loose. It made me wonder if using a cam strap looped through the d rings would be any better than the ratchet straps.
"If I'm not there, it means I'm dead...or late!" General W.R. Monger