It seems the capacity is reaching saturation point as whatever time we arrive it is becoming more and more difficult to find an empty bay. The last time (afternoon flight) cars were even parking all over the circulation roads. You would probably not feel it cost effective, but an investment in technology allowing nominated bays would be excellent, and surely even a form of computerised spread sheet should be capable of achieving this with NPR as vehicles enter and leave linked to the system to block out or make available relevant bays. You could even make this an extra charge above the standard and below your new valet parking compound. Anyway, food for thought.