Winter tires for Stowe in March?

Hi all. We are planning a ski trip to Stowe in early March. Driving up from NJ and staying in West Branch. We are hoping to use the buses to get around the mountain for the two days we are there. I am wondering if it is necessary to purchase snow tires for this trip. (We will probably never use them again as we are temporary east coasters.) We have a FWD sedan with all-season tires unfortunately.