I have never made a reservation, but I have never been there on the weekend of a holiday weekend for that matter. But it wouldn't huet to call amd ask the restaurant to be sure.
I would play it safe & ask them. It's a popular summer restaurant with visitors, on the waterfront. Also it's Fathers Day weekend, and fairly warm for Gloucester.
I would give them a call
...you shoukd probably contact the restaurant! :-)
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