Stuck in park, the dash lights were blinking before I parked the car at the store.

Check the brake lights to see if they are working. When they fails, the interlock would prevent the shift from being shifted out of park. If brake lights don't work, check the brale fuse.

Your vehicle does not have any emergency override functions so you would have to try turning the ignition to ON and deprssing the brake pedal to tryto activate the interlock shift solenoid. However if the brake lights do not work, the solenid is not going to release.