From central Louisiana, hunted ducks and whitetail all over NA, but never pheasant. Going to North Central KS, Glen Elder in mid-January.

20 ga Browning silver, 12 g A5, or 12g Silver in 3.5"
Shell prefrence?
Vest, coat, boots and so on?

I now it could be 5 deg or 75, but any tips for the first timer?
Thanks