Regardless if long term or short term, I always clean the faucet connection off with anti bacterial soap for 30 seconds or longer. If Parking for a while, and then place a Y connector, with at least two outlets on it. If really going to be there a while, I will put on a 4 outlet Y adapter, this is especially true if out on the west side of country, because of very low humidity, winds, and FIRE. I will put a second water hose out, with nozzle for the off chance of fire.
I then if needed place a 45 connector, since my water pressure regulator wants to be mostly level (see link here-
Amazon.com: Renator M11-0660R Water Pressure Regulator Valve. Brass Lead-Free Adjustable Water Pressure Reducer with Gauge for RV Camper, and Inlet Screened Filter: Home Improvement ) - Then fresh water hose to coach.
Now we don't leave water on at connection all the time, we keep the tank full per auto fil, and use it at night for sure. I will hear water pump if it runs, so then I would know if I had a leak. If we are washing clothes, or doing a lot of water use, we will use shore water, and if within a day of leaving, fill up the tank after we do all our washing, etc., and live off tank so the FW stuff is put away. That way I am not rushed to remember this or that.
I use a separate back flow preventer, pressure regulator and hose for flushing out the black tank, and NEVER hook my fresh water system to the black tank flush system, even though there is a built in back flow preventer, they can fail. One of the biggest things to make you sick is to get contaminated water, trust me, you will take many precautions if you are ever sick from that. I also sanitize the fresh water system at least every 120 days if coach use is sporadic, and at 180 days regardless if we are in continuous use or not. Varied methods to do it, someone will tell you if you ask.