Sinking Creek 4WD Association

Hey guys, I got back to my Jeep yesterday and had an invitation on my windshield, which i at first thought was a parking ticket. I drive a 2006 Jeep Wrangler X, 4.0L. I've had it on the trail a few times, but rarely take it out becuase its my DD. My friends and I make regular trips up to the high cl...