Don't know about the D300, but pretty sure the D90 did when I had that. LR only shows you some of the contents; grab a copy of the free EXIFTool, drag and drop a photo onto the icon, and you'll see half a dozen pages of different EXIF.
(Oops, just noticed you're on a Mac. Not sure if EXIFTool is available for it or not. Should be though since it uses an open source library)