Re: Parental decision dispute
I would allow it if it were an organized youth activity with a church, 4-H, a school or rec department ball team, something of that nature. Those activities would include adult leaders and organizers bearing some formally designated legal responsibility to provide oversight and protection to the kids, and he'd be with a group of children roughly his own age.
But this isn't that. This is a guy you've met a few times giving your 13 year old a lift to an all-day, mostly adult, event in another state. There's no formal chaperonage, no group of buddies his own age to watch out for one another, and really no one to take responsibility for him if anything were to happen. Have you been to this event before? Do you even know for sure whether the culture of this event is something you'd be okay with your child attending?
If he were 16 or so? Probably. But not at 13.
If he wants to go, and you're okay with him attending, then take him and make a family weekend of it.
You'll find that many of the truths we cling to depend greatly upon our own point of view. - Obi Wan Kenobi