I would check with the campgrounds where you will be staying and state parks you will frequent for their rules & regs. In our state, you cannot let any gray-water go into the soil. A portable shower is a dead giveaway to the staff and other campers.
Just something to consider...
Theo & Carol
2007 GoldenDoodle ("Cooper")
2020 Rockwood Roo 23IKSS
2015 F-150 4WD XLT SCab, 5.0L, 3.73, 36gal, HD Towing Pkg (53A), 1,980lb Payload