IF they do like the LPGA, they carry their own radio cache with them and a portable repeater. I was a Chesapeake Police Officer and worked the LPGA event years ago when it was held in Chesapeake. They used a lot of iternant frequencies as well. This was in the mid 1990s.
You probably should try to get closer to the event if everything is simplex.
Regards Richard in Chowan County NC