[hagcam]

I bought a water softener off of eBay, one that was sold as a portable rv water softener. It looks like a fibreglass scuba tank. I run campground water through a particulate filter, home depot plastic filter with replaceable filters, and then through the softener. I always use the water from my tank. If I have to wash the bus I use the same arrangement to wash and rinse the bus.
The softener was a couple hundred dollars, rejuvenates with a couple pounds of table salt.
I am very happy with this arrangement.