I don't have one. I only connect my sewer hose when I need to dump and that's the day I leave the site, even with full hookups.
I don't use "hundreds" of gallons of water a day while "camping" either. I never even hook up to the city water line, even in full hook up sites for a long 4 day weekend.
I bring my own water and like using it as needed. Do I need to take a 10 minute shower while "camping" like I do at home every day??? no... I like being dirty once in a while and roughing it while "camping". It is my time to do that... ha, ha... I don't have kids so that helps a lot too I'm sure! Wife and I do just fine with each other!
Everyone does what they need to do while "camping". What I do or what you do, it does not matter... It's what works for you while you are out doing what you want to do in the wilderness..
I LOL to myself at folks that I see hooking up their sewer line even before they have unhitched their trailer! But, that's the way they setup camp for themselves, so that's what works for them. I'm sure I give a lot of 'observers' something to talk about with the way I setup my rig or do things during my stay. Who cares? I'm doing what works for me and that's all you need to do too.
Good luck! Mitch
2013 F150 XLT 4x4 SuperCab Max Tow Egoboost 3.73 gears #7700 GVWR #1920 payload. 2019 Rockwood Mini Lite 2511S.