Set up the outdoor shower with sufficient plumbing to ensure it has a usable pressure, and is warm enough for most reasonable weather situations.
I have reopened this task because the previous set-up was a bit ad-hoc and has become overgrown. It was suitable for the event at the time, but a more permanent and professional solution is now desired :)
This task does not necessarily have to cover the privacy screening parts of the shower, which shall be done in T156: Create outdoor shower frame, T50: Install privacy door or curtains for outdoor shower and T70: Create privacy curtains for outdoor shower.
This will likely require T155: Install automatic pressure pump in Tiny Village to be done first :)