Thanks to the Maine Aeronautical Association for publishing its calendar of events. You can find the events scheduled through July on the MAA Calendar webpage. They also provide a document with all the known events for the year of 2018, which I’ll reproduce here. I’d recommend checking with the MAA or the contact person listed for an event before showing up– weather has a way of changing dates.
Fly-ins are great fun! You’ll be bringing the lightest aircraft to the show, so be prepared to answer lots of questions. Make sure you talk to the airboss or someone in charge to understand the norms of the fly-in– radio frequency, take-off windows, pattern, where to loiter in the air, etc.