Always an interesting topic and yes we all have to learn as we go and hope that we improve as we move along. I did not always wear gloves but since I have been sick I wear them know. Also my grey tank does the rinse, I never use any type of hose but have seen people take the white hose right from the trailer to the sewer hose to rinse and this was a guy who told me he had been camping for years. They now have a blue hose for drinking water as well.
I always open the kitchen, connect the water hose, put on gloves, hook up sewer, remove gloves, wash hands and move on. When closing I put on gloves, dump and remove hose, remove gloves, wash hands, close kitchen, remove water hose.
Seems to work.