Great place, I'd stay again
I stayed here for Independence Day as it was the closest available campsite to Eastport.
I arrived at around 8 am, and since there no campers from the night before I could check in without issue. One of the owners was on site and he was great.
I was at site #1, which is more secluded from sites #2 and #3. The tent was much bigger than I expected and was loads of room for only one person.
There was a fire pit and some precut wood already stacked.
I stopped at the Smithereen Farm Store on my way to Eastport and got a delicious chocolate chip cookie and met the other owner, who was a pleasure to talk to.
On my way back from Eastport in the afternoon I ended up catching the owners in the parking lot as they left, but they graciously reopened the store for me so I could get some groceries for that night.
The store also has a car charging station, and taps for refilling water.
A couple of days before my stay I also received an extremely comprehensive .pdf which explained a lot of the noteworthy places around the entire state, as well as the area directly around the site.
I was very happy with everything about the site, as well as the wider Pembroke/Eastport area.
Dogs are allowed on site, and I'd note for dog owners that I pulled four ticks off of myself at the campsite.
The blueberries weren't fully ripe, but there were a few delicious berries present.
Great place, I highly recommend it