I want to add, the instructions or tips, for dumping your 2 holding tanks...
you should follow advice above, gloves and the Black (toilet) tank needs a chemical, and you need to start your camping trip, with at 1 or so gallons of water in that tank (as per instructions on most of those chmicals) I was supplied with a powder packet, I like the liquid better IMHO).
SO, now when you are done camping, in kansas most parks have a dumping station and I use it instead of carrying it to my town's dumping station. Any way, you hook up your hose, and drain the black tank first. Black tank is noted with bigger pipes, and the valve you pull should be bigger than the other, and might well be color coded, I painted mine RED on the last camper I had, didnt do it this time. Why red? well, we use grey water from time to time when boondocking, to wash the motorcycles, and it really isnt cool, if your helper opens the wrong valve at some point,
lol! After you dump the black tank, close it, and then dump the "grey" water tank. this helps flush the hose you use to drain everything a little bit, with "cleaner" water. Our dup site has a 4ft hose just for rinsing your dump hose, on a hydrant near the drain. I rince with that, and your done.
Yes, we're exteremely picky about what goes down the sinks and or toilet, especially the sinks!
No grease!!! Avoid it at MOST chances. You cant stop in everything, you get some off plates and pans, just dont be pooring it in there!!! Plus we use screens on drains that you dump to trash, to keep food particles out (Not just because I use the water you know). but I have a screen on the washer as well. after a load of dishes, I have a nice soapy mix to de-mud the cycles.
Anyway, most RV people and what have you will tell you the same...
when done I unhook yet leave hose in the hole, and rinse with the hose they usually have on a hydrant to flush that hose. then store the hose.
Last but not least, there are probably as many types of drain hoses, you probably shop carefully, but you get what you pay for. I was given a hose when I bought the camper, that hose is thin and cheap compared to the ones I had in the past, and it already torn on me (2 uses). if you dont want "crap" all over your hands, and shoes, lol, get a good and LONG hose!