A solar shower works best in places that are sunny and hot. If you live somewhere that’s not sunny you might need to heat the water on a stove and slowly pour it into the bag before you shower.
A propane shower is a great option if you’re going all out on your build and want to create a permanent heated shower in your van.
There are a couple of things to note while using a shower curtain. A shower curtain can certainly add privacy but it might not conceal everything.