Everybody has their phobias. So you need to do what makes you feel better. Is there a real danger if your hoses touch or lay on the ground? Probably not.. but you never know
I have a friend who suits up like he is going on a space walk before he touches anything to do with the sewer hose. Then he strips off the gloves and apron to work with their fresh water hose/connections. I asked him later if he thought any fecal matter might have transferred from his glove removal process to his unwashed hands to the fresh water hoses. I had to stop when he started having convulsions.
I was raised on a farm with lots of animals and am used to the associated clean ups. So I try to use common sense when messing with the fresh/sewer connections. I keep the hoses in separate storages. I connect fresh water first and clean the ends/connections with clorox when necessary. After dealing with the black tank I wash my hands. I think gloves and too much clorox can cause just as many problems as not using gloves and not washing your hands.
So do what you think is best for your thinking, just use common sense and don't get too crazy about it
Scott and Liz - Southern NM
2012 Wildcat Sterling 32RL - w/level up (best option ever)
2007 Chevy 2500HD 4dr short bed Duramax w/allison
Reese Fifth Airborne air ride king pin coupler with Sidewinder