Son of Norway wrote:
Most sewer openings in parks with full hook-ups are within about 6' of your sewer connection. A shorter hose, maybe about 8', is best.
After two decades, and countless thousands of nights spent in who knows how many different campsites, I can verify that this is 100% true (about 1% of the time :))
The other 99% can be everything from 25 to 40 ft of hose, stretched like a guitar string, to typically a 15 footer that covers most situations. I just spent the winter in a state park where they put hundreds of sewer connections about six feet from the pad, and six feet from the street. Over the last few years I have distilled the "kit" down to a ten gallon Rubbermaid storage container, with a 10 and 15 foot hose, and a clear 90* elbow. Seems to be the most useful collection so far.