Rod and reel.
Plug bag---inside of which are spare spools for the reel I'm using, a box of plastic jig trailers, spool of leader material, spare flashlight, spare pliers and hook file. Teasers, too, if I bring them.
Small Plano box of snaps and swivels in my jacket flap pocket.
Lighter, spare tip and stick of ferrule cement in my other jacket pocket.
Nail clipper on a D-ring on my jacket.
Flashlight on a neck lanyard.
Hat.
Bug goop in my pants pocket away from anything plastic.
Needlenose pliers on my surf belt in a pouch, and Manleys on my pants belt just in case I get a hook in my hand. Left side if you're right handed
That's for walk-in places if I'm plugging. It's a lot simpler with eels. A dozen snakes in a soft-side cooler with drain holes punched in it, and two frozen "blue ice" blocks under the eels. Loose hooks in the front pocket of the cooler. Leader material in the cooler with the eels, and several dry rags in my jacket pocket. I wear the surf belt and pliers outside my waders---the belt is strong enough to act as a stringer if I decide to keep a nice fish.
Now when you're fishing out of a 4x4, it's a whooooooole different story. Tackle shop on wheels, anyone?