The obvious first:
Rifles, handguns.
Ammo, lots of it.
Range bag w/tools, cleaning supplies,staple gun.
Paper targets,stands,pack of stickers.
Gatorade bottles filled w/sand,neon paint.
Table for guns, extra table if none at range.
Shooting rest.
First aid kit, sunscreen for wife and son.
Chairs.
Shade.
Packed ice chest (drinks, food).
Extra water and soap for washing up.
It takes me about twenty minutes to get all set up, but then I'm set for the day. I don't get out to the range that often, and when I do it's usually for a good eight hours.
I live in a hot climate, and I've seen guys at the range with their wife and kids who don't even take chairs, let alone a shade or sunscreen.
These are usually the people that look at me kind of funny while I'm setting up, but a couple of hours later when their kids look like lobsters my spot turns into the play area at McDonalds. I don't mind though, I'd rather the kids have a positive impression of a day at the range.
So, what do you guys take?