I had this happen to in SNP right next to Elk Wallow Picnic area. Here's the set up, I was hiking SOBO, and going up hill, a couple coming down steps to each side of the trail. As I pass between them, I start to laugh and say "Jeez, I feel just like Moses". They laugh and wish me a good hike, I do not even break stride. I hike along and about an hour and a half later, here is the same couple just inside the tree line of the Elk Wallow Picnic area. I stop and ask, didn't I pass you a while ago. They laugh and say yes and explain they are out doing an annual chestnut tree count. They explain that they live in Front Royal and come up to the park frequently. Just then the husband says, if you turn around there is a deer right behind you. Then the wife says we usually see a few bears during our count but this year we haven't seen any. I then say like the one coming up behind you and I nod downslope. The young bear was cruising just in the woods from the picnickers who were oblivious to its presence.