brulaz, when first installed, I had a "loose" switch at the rear of trailer to on/off the pump. I was waiting for a remote relay to arrive from China. Now have that mounted in rear near pump, and remote fob in the bath. Just have to turn pump on, go about am business, and shut off pump just before jumping into shower. Hot water right there!!
I looked into a wired switch in bath, and leaving pump in rear area, but as you know, our trailers are terrible to add any wiring or hoses anywhere but under the floor, which requires dropping (at least partially) the coroplast covering. That's not much fun!! Actually was thinking aboot doing the valve up in bath with a hose running back to the fresh water fill, but decided too much laying on my back in gravel driveway!!
I put the pump in the rear not far from the WH, and it was easy to hook up the electrical right there next to the furnace. There was no "easy" way to put the pump in the bath and wire since there were no 12V circuits (other than light switch) in the bath. The lights seem to be a series circuit, so no ground at switch. Thought aboot using the closet slide circuit for a connection, then got nervous aboot doing anything that might upset the Lippert gods!!! Enough problems out there with the Schwintek system, and I'm sure that the slide controller is fairly $$$ if messed up by ME!! Also thought the pump would work better pumping instead of sucking the distance to the bath from the rear!!