RV Dump Station Finders:
http://www.rvdumps.com/dumpstations/ and
http://www.rvdumpstations.info/One problem I have found is in what people mean when using the terms, "dry camping" and "boondocking".
Many seem to use them interchangeably. Others use boondocking to mean out in the boonies away from people as in "dispersed" camping in nat'l forests. And dry camping as just camping anywhere, state park or any park, without hookups of any kind.
If dry camping in nat'l forest or nat'l parks (as well as BLM or COE) campground, normally will have water close by, or at least they often do. As well as having a dumpsite close by. Not always but often.
When we have boondocked in the past, there was often water not far at a forest campground, etc.
Dry camping while traveling (more like dry overnighting), we have found water at service stations, welcome centers, Walmat/K-mart stores (garden centers), many other places.
Some town have dumpsites. Some service stations. Some rest areas (not in NM anymore).
To extend battery charge, Solar is pretty good. My son has two large panels on his TC in Alaska. We have a small one which helps. We both use Honda generators to keep them topped off as well.
Showering can take battery down. My CPAP machine does a job on it. May have to get a second battery to go with the single we have on the trailer. There is room on the tongue where the battery is. But haven't yet. Just run the generator a little, doesn't take too long each day.
Other folks are dead set against any generator use a all. Depends on your philosophy on generators.
If going to take rough backcountry roads, will take a different set up as compared to using small campground with small sites but easy to drive to them.
:EIt is always good to be able to get a vehicle and/or trailer out as well as into an place.
There may be exceptions, but the smaller a unit is, the smaller its holding tanks will be.
That is why we have a larger freshwater holding tank in our pickup.
Extra Water & How to Transfer It. an old post.
My son's Lance TC has a pretty large fresh water tank, but he also carries an auxiliary tank (can't member what size), which can be seen in this photo below:
It is on the ground here (empty). Carries it empty, then goes to get water when needed.