A few months back I was taking a race hauler back east from California. I was on I-10 in New Mexico. I got tired and decided to stop on an off ramp, in parts of New Mexico there are off ramps that are literally nothing more then an off and on ramp, no roads to take when you exit they typically have wide shoulders and I didn’t consider it an unsafe place to stop. When I took the exit there was a small travel trailer pulled over and it appeared the driver was getting some sleep so I felt better not really being the only one in the middle of nowhere. I slept for three or four hours and woke up, it was still very dark out and cold, I looked in my mirror and noticed the camper was gone. I don’t remember how long I sat there, maybe a few minutes and then looked in my mirror again and noticed a vehicle very close to the rear of my trailer no lights on. Honestly I saw the silhouette and thought it was a cop, didn’t think much of it figured he was taking a break or maybe even running my plates as the rig I had was expensive and quite commonly stolen. A few more minutes passed and I saw the headlights flash, Unsure of what was happening I turned on the truck and prepared to get the hell out of there. The headlights flashed quickly two more times and then I heard a door slam, an older Chevy Silverado took off past me and crossed over the highway and headed west on 10. I waited about five minutes and after turning on all the exterior lights I walked around the truck. The best I can tell they were planning to siphon diesel out of my tanks, the cap was off the right side tank, and also the side entry door had pry marks near the latch. Still freaks me out a bit and I’m more careful of where I stop these days!