Toilet question for Host Mammoth owner

We are on our second Host Mammoth camper. We use the E-Z Foldz 9" Folding Step Stool that costs about $8. It folds up and stores between the toilet and the wall; couldn't be easier. Works great. When not in use, it's out of the way and travels well. Also, some folks are not fond of having separate black and gray water drains. We felt the same when we bought our first Mammoth, and tried several different drain systems. Since newer Mammoths are factory-equipped with black water flush on the driver's side slide-out, there is no need to worry about the order in which you drain your black/gray tanks; simply drain the black waste tank, close the valve, run water through the flush inlet (with the drain slide-valve closed), and then drain the black water tank until clear. And, even though the gray water drain is under the generator compartment and set back, one of those folding steps makes for easy access; just sit on the step outside of the generator compartment and it's easy to access the gray water slide-valve.