There are guest parking lots in front of the Mountain Inn along Wintergreen Drive. There is also a guest parking lot in front of The Edge restaurant that is accessible from Mountain Inn Loop.
Yes, there are shuttle buses that will pick up guests from the main lobby of the Mountain Inn and take them to the Blue Ridge Overlook. The first shuttle will leave at 3:15pm and the last shuttle will leave promptly at 4pm. At the end of the ceremony, the shuttles will take guests from the Blue Ridge Overlook back to the Mountain Inn where guests can enjoy the cocktail hour on the Blue Ridge Terrace.
Yes, there are shuttles that will take guests from the Mountain Inn back to their onsite accommodations. The first shuttle will depart at 10pm and the last shuttle will depart at 11pm. For guests that rented through AirBnb or VRBO or any other third party, the shuttles will take you back to your accommodations so long as they are located on the resort property.