Our 2005 Itasca's outside shower is an actual shower head on the end of a white shower hose fed by hot and cold valves for temperature control. This is contained within the largest outside storage cabinet in the back on the passenger side. There is an angled shower head holding bracket on the wall to hold the shower head - just like the one in the inside shower stall wall - with a pump ON/OFF switch on the wall right beside the shower head holding bracket.
I do have to occasionally tighten the screws that hold the shower head holding bracket to the wall, but so far everything's pretty much stayed put and worked that way for about 9 years.
