I have only been to New London 1 time . We stayed at the Quality Inn in Groton.
It was not the nicest place in the world, but OK, and a pretty good free breakfast. it was only about 10-15 minutes to the academy. We are staying at the Red Roof Inn, in New London over parents weekend. They have a CGA rate, and are a bit closer to the academy.
Ft. Trumbull State Park in New London is kind of cool & you may be able to see Eagle there. We also visited Mystic Aquarium, which was good, and I've heard that the submarine base in Groton is good.
Have a great trip, and good luck to your candidate.