We are just back from a 2 night camp in a friend's backyard. Great time, but man it was cold! Thank God I bought us a heated mattress pad! We are planning for a 4 or 5 night stay at Salt Fork S.P. next month and will be using a water connection for the first time. I have a filter and am planning to get a "Y" splitter to run a hose to the front of our pup for rinsing, cleaning, etc. I keep seeing in other posts about using a pressure regulator. Do I need one? The other question is about using battery power. Our pup came with a battery, but does not seem to have anywhere to connect it to the camper. There is a 4 prong (I think) wire connector under the counter next to the sink, but I don't know what it is for either. I will get a picture of it when I open it up this week to check out how to use the water connection/storage tank. One thing we forgot to do was pull the crank handle from the back of the camper and put it away!! Thankfully it was still attached after the hour and 15 minute drive home!!!