I don't really have much of a checklist for the boat.
We take a cooler, dog water and a trash can.
Leaving the boat is gathering up those 3 plus whatever else we picked
up. (usually just trash)
Gas is the wild card. It is not an "every trip" thing.
If we are just putting around, we may only burn a gallon or two.
I put 5 or 6 in at a time depending on which can I use.
When I notice that gas is coming up, I hang this on the dog water and
hang it on the lift switch when I am getting off. Works great.
There was a story on the radio in the last year, where senior guy and wife
stopped for lunch on some thong trip. Guy forgot his wife and left.
People in diner bought her a bus ticket to final destination, and cops
looked for husband to tell him. Middle America. Doubt the north east
would help her.