We just got back from a eleven day trip all over the canyon area and I did a little experimenting with my holding tanks. We camped 8 nights without hookups and several of those with no water either! We have a 46 gallon fresh water and 22 grey and 26 black tank. We were able to go 4 days no problem with both of us taking navy showers each night. The biggest waste of water is washing dishes. I say use disposable everything except what you cook in. Literally do the dishes once every couple days. There isn't to much to wash if you use paper plates paper bowls and plastic utensils. Also I bought several rolls of paper towels, they work great for sandwiches and for dish rags. On this trip I bought six big rolls of bounty and think we used 3.
I also did the old equalizing the grey and black tanks by leaving the cap on and opening first the grey and then the black valve. Works great. When I dump I just remove the small hose cap on the end cap and let that go down the hose first and then hook up and dump as usual. I know some people think this is gross but that is silly. In fact two of my fishing buddies are Master plumbers and they both see absolutely no problem in doing this.
I am not sure if it was in this thread, but somebody mentioned lots of times they make the holding tanks capable of holding the volume of fresh water you can take on board. In my case this is the true.
Any this is all JMHO.
PS I still can't get myself to throw out all the plastic forks, knives and spoons there just so easy to wash with the pots and pans!
