I commend you on your willingness to post your learnings for all to similarly learn from.
I was a bit surprised to hear that you didn't already have a paddle. I thought that was a required part of safety gear.
One other addition I might suggest is a boat hook. If you had one you could have used it as a pushing device to guide the boat around the rocks.
Again, thanks for sharing. One of these days I'll post my similar Capt. Bonehead about getting lost in the fog on Sat night/Sunday morning.