That’s actually a very good question. For me, my family has so much cra—-er, I mean stuff that we bring, basement storage is at a premium. I considered just having the equipment in the cabin of the RV and then just bringing it outside when we set up. But I’ve also lost the battle of not having things loose and stacked around inside while driving. Unfortunately, while driving the RV we run the risk of death-by-impaled-bananas, coffee maker, dog food bag, kid’s school bags, etc...
I found that space under the bench by accident one day, and was overjoyed to hear my family decide accessing that storage space was too much of a pain. So, my water treatment equipment was going to go in there anyway, and I thought “why not just make it work while in there anyway? One less thing to set up.”
To be honest, if I had the outside basement room to put the 3-stage equipment in a milk crate—I would. If I did that, then I’d also consider one of those portable mini water softeners and chain it after the milk crate. The wife gets hives/itchy skin on her legs while camping, and we think that having soft water might help with that.