Laura and I spent a little while at the Portland Fish Pier before snow killed the visibility. Ran into / heard about several others looking at different sites along the waterfront.
Not many gulls really compared to some visits. We did see a 3rd winter Herring Gull that was quite "adult-looking" with gray mantle and coverts (but muddy pale gray flight feathers peaking through) that had a black subterminal band. Too big to be a Black-tailed Gull in any event.
We did see a first winter Iceland Gull roosting on a roof nearby.
None of this is to say there isn't something rare around, just that we didn't find it.