I've only used a water filter again when parked for any length of time - don't bother for one or two nighters. I have mine at the end by where the cg water comes out - cuz it's easier there with my rig. In TX I had to use my short hose, then the filter, then my long hose.
Some of these things you don't necessarily need to start with - get ONE 20' sewer hose - and if, as time passes you think you need another, add it. If you purchase everything everyone recommends, you'll discover you don't have room for it all. Only you will be able to decide, as time passes, what YOU really need. I don't want to tell how much money I wasted by getting stuff everyone thought I needed - that never got used. I don't believe that if I need something once a year, I need to carry that tool. I do know how to beg and borrow
And rvers are almost always willing to help each other. I've loaned and been loaned the things we need.
Beth
“Dare to live the life you have dreamed for yourself. Go forward and make your dreams come true.” ~ Ralph Waldo Emerson ~
"He who treasures the small things in life has found the path to true happiness"