any recommended clothing attire? knee pads, shoes...etc
Ear and eye pro
Hat
T shirt, long sleeve good idea. If short sleeve, sunscreen
Long pants WITH belt
Close toed shoes, no slippas!
Gloves, your call
Knee pads, your call (not really needed)
Camelbak, your call
Pistol holster
Mag holder
Just wear something comfortable and that you can maneuver in. I've seen everything from jeans, to shorts( not recommended) to Docker slacks, to 5-11 pants. It's all good.
Lots of water/ Gatorade, etc
Snacks
If you are there all day it's hot as hell and you get hungry/thirsty.
Lots of ammo
I usually also give a donation to Chris and the HDF Warchest