I doubt that you would run into any trouble exceeding the mileage limit while attending car events. I drove my truck to events from Va to New Jersey and Maryland without a problem. Just drove sensibly. I did the same with my Corolla years ago without any issues.

I never had issues using my truck to haul leaves and trash to the dump without a problem passing county cops all the time. I would see other trucks with antiques hauling trash at the dump. It's all illegal. I built my truck to haul so it has standard plates now.