Maiden voyage success - question about grey water tanks

I'd be willing to bet, that since I've owned a MH or FW, I could count on one hand how many times I've use one of the "public" facilities.

I have found when using the "shut-off" on the shower head, when I shut it off, I better not be standing in line of the water when I turn it back on. The hot/cold water separate in the hose that's hanging, hot on top, cold on bottom, and will give you a split second scald.