There are lots of perks to be had for people with a Yale ID!
ASTC Museum Passport Program
The Peabody Museum is a member of the ASTC Museum Passport partnership, allowing members of 200+ museums nationwide reciprocal admission to any museum 90 or more miles away from their home museum. For details on restrictions and the updated list of member museums, see this page --> http://www.astc.org/members/passlist.htm
Note that some museums may protest as simply having a Yale ID doesn't technically mean you are a member of the Peabody, but anecdotally at least, explaining that the ID affords free admission to the museum does the trick for ticket salespeople at most museums.