Fully vaccinated individuals will no longer need to wear masks on outdoor attractions. Author: WNEP Web Staff Updated: 5:43 PM EDT May 14, 2021 ELYSBURG, Pa. — UPDATE 4:30 p.m.: Knoebels Amusement Resorts announced on Friday afternoon that no masks are needed for vaccinated people who are outdoors at the park. You will need to wear a mask if you are visiting an indoor attraction. Knoebels says their employees will continue to wear masks for the time being. Original story: Knoebels Amusement Resort says you will still need to wear a mask to take part in the food, fun, and fantasy in Northumberland County.