Some are outbound, including these two classic Airstreams, seen on the evening of May 21 waiting to enter the Fairview Cove terminal the next morning. The smaller one appears to be a 24 foot Argosy from the mid 1970s and the larger one is a model 310, 31 footer from the early 1980s.
Both are in original condition, and driveable, but appear to be headed for restoration by collectors. (They are currently wearing Quebec plates.)
There are lots of references online to these unique vehicles, built on GMC or Chev chassis with Chev 454 engines.