I'm opposite to Turbs- we generally camp for long weekends or a week at a time and almost always have sewer hookups. On top of that, my camper has 2 sewer connections so we carry a plethora of sewer hoses:
- two 20' sections
- two 10' sections
- two clear elbows (so we can see the "stuff" flowing and there's no guessing)
- a wye ("Y") connector to bring it all together
I'd actually like to add another or two 5' sections!
What you need all depends on where you camp, how you camp and what your camper has.
"one hose it" 
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