Glad to hear you are OK. Hope your car is, too.
I wish you had not titled this a "positive" LEO encounter, but instead noted that it was a normal one. (Or, for the pessimists out there, what a normal encounter should be.)
Sounds like the tow truck driver was OK with OC, too.
Now a question: you say you told the cop there was a gun in the car, and then when all the paperwork was finished you went and got your handgun from your car. Were you OCing before the crash and took it off after the impact, or was it somewhere besides on your hip to begin with? (Yes, I'm fishing for someone who puts their handgun on the seat or on the dashboard to comment on where they found it after the impact, and how long it took them to find it.)