The consensus seems to be that Garcia played the Wolf at the Great American Music Hall gig in August of 75 -- after the record was done, presumably -- and the Bean showed up on stage in September. So it's likely that the Bean is not on the record. But who knows for sure? He could've done overdubs with it.
Interesting that there was only one drum kit there ... and that Mickey Hart is credited with percussion and "crickets" on the back -- good story about the live crickets getting loose during the session -- but his picture is not part of the illustration on the back cover. Although that does not look at all like Phil, either ... LOL