I wouldn’t worry about using Sta-Bil in your car’s gas tank, but what I would do is add a can of whatever gas treatment you prefer (I am another SeaFoam fan), and then I would park it with a full tank of gas.
Keeping the tank full keeps the air out of the gas tank. The air in the tank may warm up on a hot day, cool on a cold day, etc. and this can cause moisture to condense out of the air and pool in the bottom of the tank. Not much, but over time it can be enough to cause problems. Keeping the tank mostly full of gas prevents this.
If you are the kind of person who checks their own oil you may see a milky residue on your oil filler cap on occasion, this is water/oil emulsified. It is nothing to worry about but short trips do tend to let moisture build up in the engine. A good long, half hour drive once in a while would be a good thing to do.
While the oil in the engine may heat up quickly and flash off the moisture, it takes a lot longer to heat up the entire exhaust system. Even though most exhausts are stainless steel now, some components are not. You may have observed cars on the road with water trickling out of the exhaust. This water that has condensed in the exhaust and the car hasn’t yet got the exhaust up to full operating temperature.