Bill,
Within the last two years, the Casper gang have taken over the management of several of Philly's municpals, Cobbs Creek being the most well-known. Their team has done a very solid job so far, and the weather conditions have been anything but kind during these last several years. From my experience, the test is after the first few years of the contract or agreement. If the service level and course/facility(s) presentation remains consistent, you have a winner.
Some outfits start out with great intentions, and then fade. In the current environment, with the outlook somewhat uncertain for the future, speaking with a few management folks, from properties with which the prospective suitors have had lengthy working relationships, should give your panel a sound read on who to select.
Cheers,
Kris