Good article, excellent advise. I have made a lot of launch ramp mistakes over 20 years of trailering. The sorry list is, not putting the plug in, not undoing the stern straps, and the big one, undoing the bow strap and dropping the boat on the ramp.
I was a lot better at checking and double checking when I was at the helm of our bigger boats. With the trailer boats I was always in a hurry or talking to someone on the ramp and not paying attention.
Fred