never attended OBAP, only experience has been NGPA the last two years. From my experience expect to wait in long lines to see any legacy/major carrier. The booths for the Fractionals, Part 135 operators, and everyone are usually not an issue. United and Delta each had a power point presentation with limited seating. If you wanted to wait in line for UPS or FedEx, it was usually an hour unless either was your first stop. Nothing related to OBAP but hope it helps.