If you go with the Road Shower, you don't have to travel with water in it. I know it's tempting because it holds 7 gallons that you don't have to carry somewhere else. I almost got the Road Shower, but thankfully my (new to me) teardrop came with a
BOSS 18 propane hearted shower system. Showers are a luxury when camping. And solar heated water when camping is just plain unreliable, unless you're camping in AZ or SoCal in the summer. Then you'd want cool water. And if several people are wanting to shower, when the Road shower empties and you need to fill it, you then get to wait for it to heat up again. That's if you're parked in the sun, which is not desireable 'cause most folks want a shady campsite. Same reason I don't have my solar panel mounted on my rig. I can park in the shade and set up the solar panel out in the sun. Just some food for thought since you haven't sprung for it yet.
You can get the BOSS shower sytems through Amazon with free shipping if you're a Prime member. I had to replace the one that came with the trailer 'cause the PO wasn't well versed in winterizing camping equipment. Left it out in the cold and it was just like not putting antifreeze in your car for the winter. Cracked the main heating manifold wide open and now it makes a great sprinkler for the grass.