Careening on top of an Avon just might go "POP!" and blow it out.
Bob Perry is only to blame for the good things on the I28, apparently Islander messed around with his plans, changing a keel-stepped mast to the deck-stepped one with the crazy support pieces and fiddling around with the head and starboard settee as part of the process. And someone upstairs must have nudged Bob's hand, because boats designed by mortals alone just don't balance that well.
A couple of used tires might come in handy as extra fenders. They may leave black scuffs but that beats all hell out of gouges. Some extra lines, heavy lines, and a spare hand too. And the videographer of course, you know this needs to be utubed!