I coil the hose inside a 5 gal bucket, then throw the other "water" accessories in the middle (regulator, inline filter, elbow, etc.) and pop on the top. The bucket has come in handy over the past 2 years, especially as a stool for attaching the PUGs.
2010 Jayco 17Z
2007 Jeep Commander Overland 4x4 HEMI