I have a box I keep just for the track. It has mostly inexpensive hand tools that I can afford to lose (in case I loan them and don't get them back). I have one 'rack' of standard combination wrenches (I like racks as you can easily tell if you left one out), one set of stubby combination wrenches, two pairs of vice grips, one each of cutters, needle nose, large/small pliers. a Wire cutter/stripper, 3-4 sizes of straight and Phillips screwdrivers. 3/8 ratchet, set of standard and deep sockets, short and long extensions, medium ball-peen hammer, pry bar, small and medium crescent wrench, razor blade knife, sharp putty knife/scraper, flat file, rat tail file, thread file. I have a cheap volt meter, electrical tape, duct tape, 14 gauge wire (small roll), 2-3 small hose clamps and 3-4 large hose clamps, a couple of extra spark plugs, carb cleaner, brake cleaner, wd-40. There is probably some stuff I missed, but I'd have to go out and look at my kit.
All of this fits in a plastic toot box I got at Sears. It's about 2 ft tall and consists of two trays that fit on top of a deeper box. I can take a picture of it better than I can describe it. I can grab this box and know it has nearly everything I might need at the track.