I think as part of the improvements, the 1500 and 2000 loops should have an outdoor sink/drain to poor your catch water into. After I found out we had to, we would catch ours in a bucket, but I would guarantee that by the time ds got to the CS with it, it was half empty.
Also, a stupid question from my popup days for others that may not know. Where do you get a hose to fit the gray water drain? The big sewer hose that TTs use is too big and a garden hose is too small. Even when we had a sewer hookup, we could not use it. I never figured it out. We just put a bucket underneath, but that was very inefficient so we missed quite a bit.
BTW, at FW, the CS has a big sink in the laundry room where I would take my pots to clean them, just make sure the food is out. I personally use paper plates and cups so I don't have to do dishes. Also, aluminum foil and ziploc bags are my best friends. No washing required.