Costal cruising in the US shouldn’t be a problem. Soooooo many boats have inadequate tankage, both water and
diesel, but especially
diesel.
A huge water saver is the “cruisers shower”. We took one every day. It takes a quart to a half gallon per person. Jump in the water, enjoy a swim or snorkel, come out to the
cockpit or aft
deck, shampoo up. Head to toe. Most good shampoos worked quite well in
salt water. Now jump back in and rinse off (or just snorkel or swim around a bit. Now back on
deck squeaky clean and just salty. We used a half gallon water pitcher with spout. Rinsed off the
salt and you are very clean and refreshed. Obviously this doesn’t
work in a dirty harbor. But when anchored out it usually does. This saves an incredible amount of water. You can tell the boats not so well designed for cruising by all the Jerry jugs lining the decks. That would be about 75% of the boats out there.
The other big help is a good rain catchment system. I mean real good. We could fill our 200 gals of water
tanks in one real good downpour. Would last us a long time. We would let the dingy fill and use that water to wash clothes.
For catching water we used the entire boat! It had bulwarks all around. We would let the hard rain beat the boat clean for a few minutes, then block the scuppers with towels and open the deck fills and watch it gulp down into the tanks till overflowing. It didn’t take all that long. Just one good gusher. Worked like a charm. Did it for decades with no problems. Yes we kept our decks pretty clean anyway.
When we got to the
Sea of Cortez, we finally did get a Spectra
watermaker as it is a desert. Very little rain and water could be scarce ashore too. Wonderful cruising too.