You only need a length (for water and sewer) just long enough to reach the hook-ups to your camper. Wait till you get the camper, put it in place and then measure the distance. In the mean time, you can use any hose. Some will argue and say use the white RV hoses only ... OK! I'll not get into that debate. Why not go to the campsite, measure off the longest distance from the hook-ups to the farthest end where the camper will be sitting. Then go to Wall Mart and buy the hoses. They come in different lengths, so you can always buy what you need (give yourself some wiggle room) - get extra.