In nearby Kyzikos in ancient Mysia there was an especially relevant Bacchic association:
To Good Fortune. Auxanon, banker of the city and secretary of the foremost Bacchic Kynosoureites, set up the enclosure (cancelli). (CIG 3679)
The των Βάκχων Κυνοσουρειτῶν is literally “the Dionysiac group of the Dog’s Tail” which scholars take to be a reference to the constellation Ursa Minor.
In other words, there literally was an ancient Bacchic Starry Bear cult.
It’s kind of amusing that the name of the banker and benefactor was Auxanon for Αυξιτης (Auxitês) is an epithet of Dionysos meaning “Giver of Increase.”