I have lived full time for extended periods both on the road and stationary.
I found that keeping a tidy black tank becomes more difficult when stationary. My guess is that the motion helps keep things "stirred up".
We had a 325 gallon external tank that we dumped into using a macerator pump. Then the porta-potty folks would come by and empty the big tank.
Keeping the solids from building up in the RV tank was a challenge. I found that filling the tank with water and half a bottle of Calgon water softener and let it sit overnight helped.
I had some issues with solids build up and failing dump valves. The final straw was when I had company and discovered that they were putting prodigious amounts OT toilet paper in the toilet. I was rightfully concerned.... When I tried to dump, it was plugged up solid.
I tried everything I could think of to clear it. No luck... I called a septic pump company. They came out and hooked up their big vacuum to the drain. No luck... We took the big nasty vacuum hose inside the trailer and attacked it from the top. No luck.. Then I figured, if I can't suck it out, maybe I can blow it out??
I mcgivored a connection to pressurize the drain and gently turned on the air.... It almost worked.... Some air made it past the block but it didn't break the clog free.
However, it was enough to spray poo on the walls and ceiling.
After cleaning up my mess I unbolted the toilet and installed a composting toilet.
Without reservation, my new rig will have a composting toilet from day one.
2004.5 Dodge 3500 5.9 Cummins, NV5400, 5" turbo back stainless exhaust, Edger programmer & 22.5 Alcoa's
2002 Forest River 36 5th Wheel (staying home)
1992 Jayco 29 5th Wheel (Mexico veteran & headed back)
2002 "faux" Wanderlodge 40' My new toy....