Do I have to have a Jeep to participate?

No.  Jeeps have been popular in our group, but you do not need one to race.  Even most of the Competition vehicles, while they look like Jeeps, are not really “Jeep” other than the drive train and maybe the body.  You do need to have a vehicle that is Four Wheel Drive or All Wheel Drive to participate.  In our Street classes we’ve had just about every 4×4 make of sedan, wagon, SUV, light truck and full size truck.  If you want to race, bring it up!