Boat number 4 was 52 ft. We owned her for 10 years and sailed to Maine every year, then we got smarter and downsized to a 38 (no offense, the 52 was lots of fun).
Yes, you are a little long for some mooring fields, but this is not a problem. Places like Tenants Harbor and Christmas Cove can be a little tight, and only some moorings can take your size. But there are plenty of place to anchor, and plenty of mooring fields that can handle swing your boat. For example, if you cannot find a mooring in Tenants, you can anchor next door in Long Cove. If you cannot find a mooring in Biddeford, there is room to anchor outside the mooring field near Stage Island. There are places like North East Harbor that has organized their mooring field according to boat size. Although crowded mid season, they have a few mooring for your size. If they are full, you can take a short trip up Somes Sound and get a mooring at Ables or anchor in Somesville.
Anchorages, marina's and mooring fields are plentiful in Maine. Some additional flexibility is required to manage your length, but there are so many options, you should have no problems. As your reading Taft, if you have specific questions, PM me.