Since 7 players on the Region III 91 ODP, and 8 players on the Region III 92 ODP team were from NC and Florida, chances are there were several players with ODP experience.
Simple answer is, coaches will go look where they think the players will be. Most often when players, or their coaches contact a college coach, they will include the schedule. College coaches tend to go to an area where they can see players in high levels of competition.