I use disposable gloves and know how to take them off correctly. Only one time in particular were they needed... a campground with a really bad dump station, where the pipe was 6 inches above ground and surrounded by gravel, not concrete. There was brown "mud" all over the place. I managed to get the outside of my stinky slinky rinsed off, but I did have brown "mud" on my gloves by the time I was finished. I was not happy with that dump station!
Yes, I routinely dump without a speck of dirt getting on my gloves (or even water sometimes), but I wear the gloves just in case. I don't worry too much about my boots... I step carefully, and usually don't eat any food that falls on the floor of my truck under the driver's seat.
At our local state park you see a large variety of dumping "styles". The dump stations there are large and well designed. The pipes are flush with concrete, and the concrete pad is large and sloped to the pipe. One time a gentleman showed up to dump and I think he had not done it before, or at least not at that type of station. He pulled up and lined up the tank drain with the sloped pad, opened up the tank drain without a stinky slinky, and let it drain out and flow down to the pipe. Afterwards he rinsed off the area thoroughly with the stations hose... by that time a Park Ranger showed up and told him to please use a stinky slinky in the future.
Another time an "experienced" camper dumped there using a hose correctly... but then removed the hose, and stuck the stations rinse hose up the campers drain pipe (from the outside) and rinsed it out with full pressure... water spraying all over the place, and he didn't wear gloves. I gently mentioned that maybe he should keep the slinky attached and use gloves... he said no problem, he is just rinsing after all the "stuff" has gone through, and he just washes his hands when he is done. To each their own!