Buddy,
Never done a PGA event but I used to do Nascar. and pre-covid that meant two weekends a year you built a PD, EMS and Fire incident response plan for a medium size city ..
First thing I would do, and you probably are already doing, is get with the incident management team and get a copy of the Incident action plan.
Second is based on your experience and the IAP you should spin up a copy of Tickets on a web server instance, vultr is one option I like due to cost and features. Now the important part build your
organization into Tickets but before you do anything else, snapshot (backup) the install so you can restore and start over. Now run some exercises , restore and repeat before you get anywhere near the
actual event .
The plan should get tweaked after every event based on your hot wash and after action reports, but the back up is going to always be your starting point even as you roll it forward so that you don't start from scratch every time.
For events like this that occur over a relativity large area I would also include Taccar maps and I would go so far as to include what three words as well. If you are not on a radio system that will allow you to
know where all your crews are (GPS enabled) find a Cellular app Lastly, be sure you understand move up / coverage in Tickets as our experience was a couple of quick transports occurring in quick succession
left large holes in the event coverage plan, and the EMS crews sometimes got hung up at the ER for extended times also blowing the initial plan up.
Lastly, we found that having a dedicated Incident Dispatch Team (two or three people) was much better and more effective than having everyone take a turn at the phones / radio.
Good luck -