ssax,
If you have a holster for the pistol, bring that and any magazine holder you might have. Bring several mags as well. I think 4 is a good #.
Also, $10 to pay the folks hosting the steel shoot.
Eyes and ear protection are also a must.
Also, bring nice cooler weather

76 degrees light wind and no rain would be just fine with me.
9mm would be fine for the timed event. If you plan to shoot the Man V Man (which is very fun I might add). You might want a .40 or .45.
In the past, I think the 9mm has had a harder time knocking down the poppers. But you can use the 9mm, just shoot faster

Those poppers look somthing like this.....
