Showering + Sink Graywater in a Teardrop?

[Will Forsberg]

Hey everyone!

I am looking to build a teardrop trailer to go camping for multiple weeks at a time. I want to have a shower and sink in this camper, but I realized I may have issues with gray water. I estimated that if me and two other people take on average a 5 minute shower with a 1.5gpm shower head it would amount to ~22 gallons every day we all showered. I can just barely fit a 30 gallon water tank in the galley - but I'd need another one in order to store the water which would use a lot of space.

I could move my fresh water tank out of the galley and into the interior of the trailer, however that would require me to pump water ~8ft to the galley in order to use it, which could be fine except I'm not sure where the plumbing would go other than inside the trailer and I am not sure what kind of pump I would need to buy for adequate flow rates. I would like this option except it would create crazy weight imbalance that would shift so probably not

Option 2 is forcing my companions to take navy one minute showers. I'm leaning towards this option now because it allows me to save space by having both my tanks in the galley area due to the smaller size. I'd probably go for two 16 gallon tanks leaving a little room in the center for all the plumbing (18"x12"x16")

Thanks for the help!
Will