So in case you haven't figured it out, I'm taking my niece to Vegas for her 21st bday. I'm thinking that her license expires on her bday. I'm wondering if I should have her renew her under 21 license about 6 weeks before we leave, so it's not expired on her bday. That way we won't have any issues with her getting into places. When she returns back to school she can get another over 21 license. Am I over thinking this? Has anyone had any experience with this? She will be flying in so TSA may also be an issue if her license expires.