Grey water draining solution

I noticed that the grey water tank seems to fill up pretty fast and in looking for a way to drain it without going to a dump station or carrying around the totes that are sold for black water tanks.  I ran across this cap that has a standard garden hose connection so the grey water can be drained (even without a hose) easily into a bucket or bladder and taken somewhere to dump. It was under $6 and fits the existing bayonet connector.  Here's a link:ValterraT1020-1VP Waste Valve Cap - 3" with Capped 3/4" GHT