Just getting ready to outfit my new RV that has two Gray and one Black storage tank, with two separate dump valves. What set have others used other than having to move hoses around. I would rather have a set up that can remain for the entire trip.
Get a wye adapter for the sewer hoses and put the wye attached to the elbow, then you can connect both hoses at once. Dont forget to use some sewer hose supports, helps keep the line clear.