New to Boston
Sorry, I just wrote a detailed reply to your posting, but the damn site logged me off while I was composing it and the whole thing was lost when I attempted to send it. I don't have time now to re-write the whole thing, but I'll pass along this link where all the New England area nudist resorts and non-landed groups are listed, most of them with websites:https://www.sunclad.com/newengland/. And, the Richmond Sauna up in Maine, located between Portland and Augusta, is here: https://www.richmondsauna.com/index.html. I can recommend Sandy Terraces out on the Cape (just a few exits beyond the bridge,) and Solair in CT (largest resort in New England,) and Berkshire Vista in northwestern MA up in the hills near Pittsfield, all are friendly places with decent facilities and good people. Richmond Sauna is a lovely place with a clothing-optional B&B.
Unfortunately, there are very few nude-friendly beaches in New England other than spots here and there which are mostly learned about through word-of-mouth or may be private.
Good luck with it, you should be arriving just when all these places are opening for the season!