Now you NEED the weather station attached to home assistant to automatically control the watering! (Maybe some soil moisture sensors too)
A couple of frost protection options: https://www.ruralsprout.com/protect-plants-from-frost/
The vineyards in Ontario and Québec use massive fans to keep the air moving and fight frost. But I think if you are building critter fencing anyways, a blanket is probably the easy way to go.