Kudos to you and yours on your pending nuptials. From your post it's a little hard to tell if you just want any scenic mountaintop for your ceremony or if you want somewhere to hold it at located in the mountains.
In either instance, try Somerset County. There's Seven Springs or Hidden Valley resorts. Both are located in the Laurel Highlands which are beautiful in the fall. Also, There's
State Parks or even the Appalachian Trail around Confluence.
Somerset County is right over the MD border and seems located "in the western side" where you'd like to be. It's also home to Mt. Davis, the highest point in PA. Talk about mountaintop view
