This is the one run a year where there really are no vehicle requirements. You're already ahead of the game with the extinguisher and first aid kit. All I ask is you make sure your vehicle is in good running order before hitting the trail (do a good once over before hand, and address any known issues).
We always welcome new people to come out on our runs, and we'll make sure you don't get in over your head. However, this run is really dedicated to an easy day of wheeling (stocker approved), and getting to know your Jeep and TSF. I encourage you to make it out if you can.