Seems to me if I pay the rent I can let a friend stay in it for a few days.
Is that unreasonable? Unusual?

You could ask but most marinas consider your leased space still theirs to do
with what they want while your not there. For example I've never seen a marina
contract that does not have a clause that requires you to notify the marina
when your going to be away from your slip for 2 weeks or more. Why? They want
to rent it. Now imagine if your apartment complex had the same idea. People
would go nuts. Why do marinas get away with this!!! In my opinion if your
going away for 2 weeks and the marina wants to rent your leased slip you should
get the money for the sub lease.
Anyway, if you want to ask I'd love to park my boat in Annapolis for a
couple of days. What's the available time?
S/V Express 30 "Ringmaster"
"No shirt, no skirt, full service"