Is it Illegal To be a vendor at a craft fair as a minor?

I'm 16 and I have my own business of patchwork bags. I have been trying to book myself for craft fairs and many have acecpted me based on my work, although I haven't actually attended one yet and none of the admins of shows are aware of my age. I have read ALL rules and regualtions of the shows im attending in the near future and it does NOT say anywhere that I need to be an adult. SO, is it going to be a problem that im a minor? Is there any kind of law that states I cannot do this as a minor? I live in Pennsylvania by the way, and I can drive so basically i'd be atending alone. My mom was saying she wasnt sure if I would need a parent there or if at 16 I could do this by myself and one show I would HAVE to drive myself to because my parents can't come soooo this won't be a problem right?