Nice photos and report.
Do you have more information on your shower set up?
The other thing you can do is make a mist cooler under your awning to cool yourself off in the heat with a system like that. At Lake Powell, we just go sit in the lake with a cerveza.
Go to places like the Camping World web site. They sell them there I believe. Mostly just a 2 gallon garden sprayer hooked to a hose with tiny sprayers inserted along it's length.Sounds cool (no pun intended)! Can you provide some instructions or photos of what you are describing?