This is correct the USPPA had events just before the pro event. I’m not sure when that ended. Maybe when gene stary passed away. But in the mid 80’s to mid 90’s USPPA was there with their handicap system.They definitely ran the USPPA tournaments immediately before the pro events. I played in many of them.
Also, I don’t remember ANY events at the Peppermill as mentioned above. The USBTC was held at the Grand Sierra (formerly the Hilton).
Last one I went to was when SVB beat Archer in the final. He double dipped him.
Great memories and was a great tourney for many many years
Fatboy