What I did,,,
On my H34 is convert the stern water tank to fuel. It's all on my web site. The conversion means you have to commit to a large watermaker. In Mexico, you will want one anyway. I read something this winter about Mexican water. The second or third leading cause of death to Mexican males is water borne pathogens. Not good. The only time we ever put shore based water in our tank was in Puerto Vallarta. Yep, half sand. If you can't catch it, don't use it. And water is rare in the Sea of Cortez. And Jerry can's? Everyone has them anyway. You don't want to pull up to most Mexican docks for fuel. Not if you value your yacht. A good dingy and Jerry can's, is how it's done. 'Course that was in the '90s.And Mike after all the Jerry cans I've hauled, your math seems suspect. Seems like 40 gallons should weigh just short of a TON! But you're right.