Had our first trip in our first RV this weekend. No were hookups so we used the tanks. Got in Friday night and left Sunday morning. Ended up with 2/3 full on all tanks - black, gray1, and gray 2.
Used the first dump station today too. Pulled in, put the disposable gloves on, got the cheap hose the RV came with (didn't want to use my Rhinoflex). Stuck the raw end int the dump hole. Connected the bayonet and let her rip. When it slowed to a trickle, hooked up the outside shower hose to the black tank flush and let that run for a minute or 2 (wanted to empty the fresh tank anyway). Listened to it trickle and then dumped the gray. Moved on to Gray 2 and then had the wife put 2 or 3 bowl fulls into the black.
Hosed down the hose and into the bumper it went. Hosed off the ground quick and away we went. Probably 15 minutes total.
When we got home, dropped the enzyme treatment into the bowl and off to storage she went. Will pull it out next weekend for more fun.
It's a tank full of poop and dirty water - never going to be spotless.