I was there from 8:20-12:00 this morning and had no luck with it either. I feel like I know my way around Dennysville now, did a pretty thorough combing of the area. Even came back after a run over to West Quoddy Head and made stops along the river and at any open fields I could find. If it has left the area, I'm wondering how much the abundant crow population might have had to do with its decision to do so. They were worked up about something or other almost the entire time I was there.
Ran into a pretty good mixed flock at the end of Salmon Club Road, will be putting together an eBird list to post as soon as possible.