I'm getting back into shooting after a long time away. A few lessons I've already learned:
Tools: a decent set of screwdrivers or the like. I have a bit driver with a bunch of bits I bought specifically for range use. Allen set of some type. A small crescent wrench and needle nose pliers.
Cleaning rod. I had a stuck case once and I had to have the range officers scrounge until they found one, no more of that.
A few empty ziploc bags. I keep my brass & these are helpful for sorting. I would be willing to be that you can come up with other uses as well.
Clean towel and/or rags.
Pen, Pencil, Sharpie & a notepad of some sort.
I carry a second bag (old kids bookbag) for various target related stuff (when needed). In it are my sandbag rests, a various targets, staple gun, Metal spinner target & a rubber mallet to pound it in with (beats using a rock).
MSgt, USAF, Retired
NRA Life Member
The hardest thing to explain is the glaringly evident which everybody had decided not to see. - Ayn Rand