I needed to empty the black before heading north. Worked for what I needed. As other mentioned, filling water is not ideal. Also, it cost me $15 bucks this last week....so maybe the days of a $5 dump is gone.
Plenty of places to find camp. Expect wind and off-road vehicles cruising around. We had a great time this past week with a couple of families. The north end of town is very convenient for connecting to your adventures around Moab.