karrank,
At FWA we work multiple parachute operations at several of our satelite airports. All the operators give us a call airborne letting us know what altitude that they are climbing to. We ask for a one minute warning prior to kicking them out the door.
At the one minute prior to jump warning we check for any traffic (IFR or VFR) and advise if they are or appear to be a factor, we also keep any overflights clear during the jump.
The majority of the time we have a good working relationship with the jump plane pilots, we try to visit them or have them visit us so that we can discuss their operations so that we can avoid any potential problems.
Mike