Also, there is a sign reading "G. Chiniquy Blacksmith" in the same scene. That is a reference to Gerry Chiniquy.
In the dancing sequence, you can see a building in the background that says "Ken Champin Veterinarian". Ken Champin was one of the Looney Tunes key animators.
When Bugs is first seen, the door frame next to him has "Friz" (Friz Freleng), "Mike" (Michael Maltese), "Tedd" (Tedd Pierce) and P.J. (Paul Julian) carved into it.