Now this is only MY opinion, but I think a whole lot is being made of something that is really pretty simple. I believe most of this discussion is more appropriate for LARGE tanks and big mohos/trailers. I don't use any extra stuff to dump the tank in my trailer, nor extra stuff to clean it out. I use Scotts one-ply t-paper (and only as much is needed to do the job!), I use a powered "digester" purchased from WallyWorld in the tank. I put a 1/2 gallon or so of water in the tank (and the digester) prior to use (to help prevent the dreaded Poop Pyramid). I empty the tank when full and repeat above (as necessary). When I get READY to go camping, I've been known to dump a bag of ice cubes into the tank (through the flapper) and let it scrub the tank clean during highway travels...and dump the tank upon arrival.
Works for me
My trailer is a 1988 and has seen a lot of use...so far black water tank problems have never been a concern.