Winterizing for part time living

This is my first winter with an RV. I’m looking for feedback on winterization requirements from all you experts.

I spend 2 days a week at my RV. I live in Washington state where it seldom drops below 30 but can get down to 10-20 degrees for a day or two at a time. I am connected to water, power and sewer. I’m not interested in a full winterization and de-winterization every week.

1) I have a heated fresh water hose. Do I need heat tape or some other solution to protect the spigot and internal pipes? My alternative thought is just to leave the water dripping while I’m away so the heated hose can protect the whole system.

2) I will pour some antifreeze into each tank after draining the grey and black tanks. Do I need to get heat pads for the underside of each tank?

3) How do I protect my hot water tank? I usually turn off the heater when not in use, should I let it run full time? Or can I turn it off and let the hot water faucet drip as well?

4) Do I need to leave the furnace on while I’m away? I assume not.

Anything else I should think of?