I put everything near the camper. That way I’m more likely to look at it occasionally. If using the non metered flow regulator, that might be placed on the supply faucet.
2019 Wolf Pup 16 BHS Limited, axle flipped
2019 F150 4x4 SCrew SB STX 5.0 3.55 factory tow package, 7000#GVWR, 1990 CC Tow mirrors, ITBC, SumoSprings,