I've seen them around Delaware lake. I know a spot where were one likes to nest, too. Never taken an egg or disturbed her when I've seen her, though, other than to take a pic w/a crappy camera phone. I hope she nests in the same place again this year.
Here's a pic of the nest.
Well, was gonna post a couple pics but can't freakin find them, now. Around a dozen eggs this last time.