<snip> While Samoset is listed at Rockport, it is between Rockland and Rockport (and, I believe, actually closer to Rockland). <snip>
I'm not quite sure what you mean by this statement. Samoset Resort (where we have owned and used weeks for some years now) is located entirely within
Rockport (although not particularly near Rockport's tiny "town center" or its' sheltered harbor) and Rockport is the town to which Samoset interval owners pay real estate taxes.
Rockland and Rockport are of course adjoining towns. The long granite breakwater which extends southward from near the south end of the Samoset property in
Rockport actually protects nearby
Rockland Harbor, which is "inside" (i.e., west of) that breakwater, so some geographic confusion is perhaps understandable.
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To OP: Samoset (affiliated with
both RCI and II) is a very difficult "trade", except off season (early Spring and late Fall; you surely don't want to be there in winter).
Two other RCI-affiliated timeshares further south in coastal Maine (in Ogunquit, to be precise) are Hillcrest Condominiums (RCI #0392) and Seacastles (RCI #1574).
In nearby Wells, although I would
not recommend it (basically just a converted motel, situated right on busy U.S. Route 1), there is also Sea Mist (RCI #3643).
Two other timeshare properties "downeast" in coastal Maine are Acadia Village Resort in Ellsworth and Harbor Ridge in Southwest Harbor, but I believe that both are
only affiliated with Interval International as an exchange company (i.e.,
not with RCI) and your posted inquiry clearly specified interest in RCI affiliated properties.