Leave it plugged in an as Mr T said try and keep the batt around the mid range. 70% if your situation allows it.
Think the car uses minimal power when not in use. If it’s plugged in it won’t matter too much, think it uses around 200-300 watts just ticking over (don’t quote me on that but it’s around that). If it wasn’t plugged in Then I doubt it will move more than 1% (for your short trip anyway)
This is on the basis that sentry mode isn’t active and you ain’t checking the app every 30 seconds - all of which will use more batt