Having it! My camp's various groups are all pretty dead, and it's sad because there's a lot the alumni can do to help the new staff. Also, for organizing "reunions."

Hiring a staff that is all certified in something (like ropes, archery, lifeguard, small craft...) and have them switch shifts and be in the units equally,
or hiring only a few staff with certifications and having those staff not be in units as often?