Extremely over crowded in the summer. The park closes daily very early as it hits capacity. The best times to go are winter, spring, and fall. Lights on the Bay is a great Christmas light drive thru that's over a mile long. Great host for the polar bear plunge.
Great day at the beach.
Sandy points Maine features are their bay side beach line, and boat rentals and fishing/crabbing. Not a ton of options beyond that, and get extremely crowded during peak season.
This park is extremely crowded and very dirty during the summer season.