We agreed that the stuffies at Champlins were the weakest part of the meal.
Although I enjoyed Marguerite's, I've had better...My vote for my favorite goes to either The Crows Nest (which you had been to but if I recall you were too "stuffed" to enjoy), Duffy's Tavern or Possibly Evelyn's Clam Shack (although it's been a really long time since I've been there.
Except for Marguerite's, I've enjoyed all those places for many years. Duffy's is right across the street from where I attended Jr. High School in the 1970s. I probably have patronized The Crow's Nest more the other places on that list, as it was consistently very good.
Champlin's was usually very good, but occasionally threw an air ball.
While Champlin's has an excellent seaside location, I've never been all that pleased with their clams, chowder nor scallops. I do, however, enjoy having mussels, steamers, lobster and especially their flounder fish & chips, although their chips are also much to be desired. For scallops and hot lobster roll (cold, not so much), I much prefer Monahan's in Narragansett, although their clams are much like at Champlins.
IMO, the best fried seafood in the state is served at Buttonwoods F&C in Warwick. No seaside setting nor steamers / mussels / lobster, but exceptional fried clams, scallops, chowder, baked scrod and fresh cut fries & onion rings. Also like Crow's Nest.
Glad you didn't take him to Aunt Carries nor Iggy's. Not sure I've ever had anything worthy there.