I found one of the Snowies on the north side of the dike leading from Sigler Rd. It was about halfway past the start of the Long Pond Unit. I was really fortunate to find the bird considering I forgot the numbering system of the outer cells is south to north. As it turned out I was about as far as I could get from the area where Andrew and Jerry had their observations.
I also saw a Caspian Tern on my way back in.