I use two alarms (less then $20 each) in the drivways that watch our RV, my truck, my van and my wife's SUV. The alarms alarm in the house if anyone apprears. We also use the same in AZ for the driveway and the patio. Also have automatic lights all around. The lights help with sight of/for the AR-15 w/cap mag and 45 judge colt. (I would rather be judge by pears then crried by my friends.)
Only had gas taken once back in the early 70s. The cop that lived at end of the road said his son did it and he would take care of the problem. Found a 20 dallar bill taped to car window a week latter.