You're not wrong. If you were parked in the boonies of the parking lot then shame on him. I still would've called the police, gotten a report and then taken the truck to get it checked.
When I was 16 and had had my permit for 10 days I got rear-ended. The guy took off. Cocky 16 year old me took off after him. (Mom and my BFF were in the car with me). Long story short, the guy stopped, mom goes to find a pay phone (1984 peeps) the guy threatens to take off, I tell him I'd like to see him try. (BFF is mortified, horrified and terrified).
Police (and Dad) show up. Guy was drunk, had a warrant and we had $1500 worth of undercarriage damage)
His insurance had to cover the damage.
Some people are just idiots.