After 5 pages, wow, never knew this could be so complicated.
Never even slept in an RV before buying the camper a couple years ago and though it was pretty simple.
Hook up he hose, 2 minutes
Dump the black water, 1 min
Dump the gray water, 2 min
Spray down any splash back if needed 1 min
Put hose away 1 min.
Not even sure if it took that long.
Of course we never camped where there was a dump station so after the drive, any "contents" were well stirred and dumped well.
At home once in a while I'd put 5 gal in he black tank to get the rinse going on the next trip.