One question, does your local regulations say that once you are hooked, the vehicle is in your possession until a release is paid for? If so, hook it and then throw dollies, then go about your day. We would get to the vehicle, hook the front, or rear, and once we had it, it was ours. Even if the person came out, we still had legal possession of it and were allowed to charge a drop fee in addition to the hook fee. If they didnt want to pay it, off to the yard it went. At the time, the regulations here were $131 p/h minimum plus $70 drop fee and 15% fuel surcharge. All set by the state as required fees. We also would charge an after hours fee, (not state regulated), if someone just had to have their car back at 3 am. The person could avoid the drop fee and the after hours fee by coming in during normal business hours to get it back, this would be only 1 day storage for them which at the time was only $15 per day.