As far as the house goes, we have always had high standards for cleaning and all appropriate surfaces have always been cleaned after each stay. Please bring a mask for your shopping etc but otherwise do what you would do at home with respect to hand washing etc. It appears that the bug is transmitted via a respiratory exposure and far less likely to be transmitted on surfaces.
This too shall pass! The country spots like this are a great way to decompress from the cities where life has really changed a lot. Lay in the hammock and chill. Have a glass of something on one of the decks. Maybe we can learn something from all of this!
6/14 update: A list of wineries that are currently open for tasting etc. can be found HERE. Enjoy!