threelapfancy wrote:
my concern would be that the stern of the boat could float left or right over the bunks, and then really be off centered, possibly causing damage to the hull of the boat and/or the fenders of the trailer if the boat moves over that far and contact is made between the hull and the tops of the fenders.
Does your trailer have the side rails (usually behind the tires), or just the fenders over the tires? It sounds like, by your description so far, that you don't have the side rails. I have the side rails, and that makes it very easy, because those are always exposed above the water.
Don't take this the wrong way, but I think you are overthinking this. if the front of your bunks (the end nearest your truck) are out of the water and you have to really crank the boat up, then you need to back in a bit more. I wouldn't worry too much about the strap breaking and causing injury, unless it is really frayed, worn, dry-rotted, etc. I have had a strap break (stitching at the hook) and it simply dropped, no whipping about. Remember, the hook is attached to the boweye, so it can't come back at ya.