I feel all of your waiting pain... I used to be one.
A few years ago I was getting my septic pumped and noticed the riser top the guy took off was fiberglass. I looked at the guy and said "This is fiberglass." He looked at me and said "Yay?" I told him I could drill a hole and put a clean out in it. He said "Yay?"
I bought a hundred feet of sewer hose and voila.
Now mind you, it is a pretty steep downhill from the RV to the clean out so there's no chance of stragglers.
Basically a poop autobahn. I've never been happier.
Keith