Thanks to all who recommended eating options with my toddler in thread of a couple of weeks ago. Here's what we wound up doing this past Monday-Wednesday:
Lunch Monday: Cindy's, in Freeport. Solid crab roll & excellent fries, slaw, as I remembered. Cindy gave out free fries/rings a few times as they were really crowded. My daughter's fish 'n chips were also very good.
Dinner Monday: Muddy Rudder, in Falmouth (or was it Yarmouth?) We couldn't chance waiting on a line that night and it was raining. Had good chowder, though I was hoping for some of the non-dairy chowder like I'd had in Boothbay. Lobster pie (w/newburg sauce)was good, but I felt like a loser ordering it. Wife's Lobster Cobb was great, but you can get in NYC too.
Lunch Tuesday: Red's in Wiscasset! Waited 45 minutes, worth it. Great lobster rolls of course (and hot dog for pup), and we also got fried clams. I've never had better clams.
Dinner Tuesday: Harraseeket Lunch & Lobster, Freeport. First off, we went early because of crowd hype and there was no wait at all. I got lobster & steamers: pretty good (you really can't screw it up too badly), but I liked the Lobster Coop in Boothbay Harbor much better: more selection, generosity, better attitude. Wife had a fish sandwich that was out of this world. Fries from baby's chicken nugget plate were fair, but not nearly in the same class as Cindy's.
Snack Tuesday night: Because we'd gone for dinner so early, wife and I were hungry after pup went to sleep. Walked across to Thai Kitchen in Freeport and brought back Pad Thai for us, also because of the novelty factor. Generous, but very bland.
Lunch Wednesday (on way home): The Landing, in Kennebunkport. OK, for an expensive tourist trap with a lovely view, it could've been worse. Boldened by Red's, we shared a small order of fried clams as a starter, but it was pathetic. Wife had a lobster & crab Ceasar salad, which while expensive was excellent and generous. I ate about a third of it. I had a fried haddock sandwich that was out of this world. It was a thick piece, lightly battered, tasting wonderful.