Not sure if you’re solo or in a group but our groups have a boat “kitty”. Each couple puts in $200-225 at the start of the charter. We use it to pay for mooring balls, ice, trash, water & misc shared expenses. IF we have any left we use it for fuel at the end. Fuel dock took credit cards last time we chartered. We personally take another $1000 for the the two of us. Always end up bringing most of it home.