I also felt like there were eyes on me - but maybe that's because I shared the shelter and area around it with about a dozen hikers since I was there in thruhiking season (May '05). I was on a long section hike.

I remember 2 things about NBK:

1. All the thrus were bitching about having to go back down the hill for the water source.

2. I met Fishin Fred there for the first time. I think he and I were the only non-thru hikers.

Re. "creepy" feelings at shelters, I felt that way at Brink Road in NJ.