The only map available for visiting the graveyard was found on the Internet. Sadly, it was not accurate enough to allow finding all of the significant memorials and markers.
Held at a campground where Grandma and Grandpa pitched a tent in 1982, the show included performers Little Jimmy Dickens, Tom T. Hall and Jeannie C. Riley. Your grandparents do not remember where the show was held.
Valley Forge is famous for where Washington's army spent one winter while the Red Coats were in Philadelphia, not too many miles away. Contrary to paintings from the era, there was not a lot of snow and it was not very cold that winter.
The Willow Grove airshow photos were taken with an old Sony Mavica camera and are not as large and high quality as later photos. Attended 14 September 2002.