Rosie...............re: the gallon jugs of water........................yes, the toilet flushes. However, the SU does not travel with water in the tanks. So, in case we have need to use the restroom while traveling and there is no decent place to get off the road and use a gas station, etc. we just pull off the side of the road (and act like we need to get something out of the RV............
), go in and *P* and just use the water from the jug for a flush. The SU always re-flushes and drains the tanks after we get home, so a little whiz and water isn't gonna hurt anything.
He keeps some of those black nitrile gloves in the cubby where the hoses are for when he drains the tanks. I realize that some people are squeamish about "waste tanks"..............we farmed and were in excretia daily so it was not a big thing.
There is always soap and water available for hand washing afterwards, so we're good to go.