[justpete]

FWIW all I brought to my first track day was my helmet. Later a torque wrench became important. Later still spare tires (both directions), a quality jack (Brunnhoelzl), impact wrench and too many tools, etc. became necessary.

A small cooler with water and protein/trail-mix bars and Blue Ice is handy but not a necessity as the sponsoring club should be providing bottled water. Never have needed a canopy or chair, toolbox or tires is fine as you'll be in class or on the track or at lunch with little time to sit around.

HACK's dead right - first time is totally overwhelming in every respect. Bringing anything is just a distraction imo and anything you end up needing someone is sure to have and would be willing to share, just the way it is in the paddock.

Go slow and listen carefully to your instructor, it's infinitely more difficult to go fast than anyone ever believes. As an acquaintance said, "the corners are humbling". And he was driving a new M5.