I have a River Bank system as well. IMHO I think it is the most comfortable and user friendly system out there. As we all know, what goes in must come out. As riverwild said, Scat machines are disgusting and I prefer to use RV dump sites. The Riverbank system can be easily and rather oder freely cleaned. A few things should be touched on first, while wearing rubber gloves of course! Pre-trip: Spray the interior of the container with PAM cooking spray. It keeps shit from sticking to the sides of the container. Pre-launch: Make sure EVERYBODY understands that only TP and poop go in the bucket. NO "flushable wipes", NO feminine hygiene products, NO male hygiene products, NO nothing that isn't poop or TP. As to TP, make sure everybody understands that you don't need to "cover your tracks" or build a "landing pad". Use only the amount of TP you need to accomplish the job at hand. This is very important when it comes to cleanout time. Pre first use: I usually squirt a bottle or two of RV toilet treatment into the empty bucket. Then "let "er rip". During the trip: I usually sprinkle some RV treatment, or the odor eliminator of your choice, in the container when I'm packing it up after last call. Last day: pour some water in the container and cap it off for the trip to the take out. This helps agitate the contents and break things down for easier removal at the dump site. At the dump site: Remove the inner bucket from the outer protective case. Tip the bucket back at about a 45 degree angle from the cleanout opening and slowly, SLOWLY, twist the cleanout opening cap open then connect the cleanout hose. The most dangerous part of pulling the pin on this grenade is now done. Hose should be in the dump hole, connect the water hose to the top fitting in the lid, turn on water flow, let fill a bit then start sloshing around. As the more solid contents are flushed out into the dump, start picking up the bucket, and with hose connection down, empty and slosh. On a side note, make sure all the connections are secure before starting this dumping procedure, Iv'e heard some stories about explosions and that ain't good...
And just a comment about Split Mountain take out and RV cleanout, I have been down Lodore and the Yampa many times over the years and while the rangers are hit and miss(mostly very good)the groover dump has always been reasonably clean and a good place to offload the load.
I hope every one has a GROOVY day!
Mark