Scott, BTDT. Most of us have stories. A friend or ours was riding along, and he got out as we were going to dump. He offered to help, and there wasn't much for him to do, except put his foot on top of the 90 that went to the standard dump. We had about 200 gallons of goo that we were dumping. Open the black valve, and whoosh. Then it didn't sound right....hmmmm....still talking away though. Suddenly "stuff" geysered up from around the fitting, covering his foot and pant leg. It wasn't funny, but LOL, it really was. That dump was plugged. I NEVER put my foot on the dump 90 anymore. If there's a mess, oh well. I stay away
Here is what we use. It is clean and easy. We are still on our first hose, after almost four years. http://www.campingworld.com/shopping/item/duraform-premium-sewer-hose-10-ft-/35179
Basically is is stiff, but extendable. You can shape it, but it stays stiff.