So your joining to "no self contained mode" gang. You'll like it, get up in morning, fill tank, no big deal. Membership is growing flooded RV by flooded RV.
Also if like us when you get ready to go somewhere and lock door and say to yourself...Dang did I shut of the water pump?
My reminder light...
Run a wire with small (not tiny) LED light from pump switch to some place you can see front of RV as your walking/driving off. If you have room to run a wire add a slice with tiny LED light in bedroom, visible from bed.
Learned our lesson the hard way also.