How you can deploy IPv6 to your campus?

You should deploy IPv6 to every IPv4 segments
Separate IPv6/v4 segments do not make sense
L2/L3 switch based deployment (cisco catalyst 6000)
create a trunk port that can access all ethernet segments
put a BSD box to the trunk port
BSD box behaves as the IPv6 router for every segments
BSD box tunnels IPv6 traffic to outside using IPv6-over-IPv4 tunnel
If you have multiple campuses in remote locations
If you have some routers that cannot be upgraded to IPv6
Have IPv6 router at each locations, establish IPv6-over-IPv4 tunnel between campuses