If you really want to hear GORY details. I can tell you about a Festiva trip where we had 1 pontoon, and another couple had the other forward berth on a 42 cat.
they used close to 500 gallons of water...we used 20. in Greece/Croatia water is a real PITA. it has to be trucked in to the key.
Other husband had a bad habit of getting WASTED and MEAN. Wife was really nice.