Sewer hose length and support recommendation

The size of your coach has nothing to do with the length of sewer hose. The factor is distance from coach outlet to sewer connection in the ground. There have been times I only needed 5' of hose. Then again, there have been several times I needed 30' of hose. So I carry a 5', 10' & 20' length of hoses...never know. Same way, I carry (2) 25' lengths of water hose and (1) 10' section. Some parks have shared water connections and you have to stretch to connect. Always better to have too much than too little.