We started out hanging a bag solar shower on the eve of the porch, then to a propane heater w/ battery powered pump, then to drum on a tower (solar) Sorry no pic's.
We we ended up using this set up for a couple of years, sorta a porch on a shed, sawdust toilet in the back part, shed door for setting lawn chair, (dressing chair), and a couple of shower curtains (most of the time didn't use them).
Colder weather we set up a Mr. Heater in the other door way, worked well, feet go sorta cold, though.
Rain water collected in one, (Blue) pumped and filtered into the "pulpit", then sprayer pump(12 volt to 2-1/2 gal electric water heater, then hose with push to shut off shower head.
(Take as long of a shower as you want, but you will only get 2-1/2 gal hot water)
This replaced one of the drums (blue one) and garden hose (black) mounted on a tower pretty much where it is now, but higher. (Solar)
Worked O.K. most of the time, but was iffy in cooler weather.