Hey Cody,
Thanks for reaching out to us!
This is actually a really good question. A kiosk would definitely work. The sale would be recorded and could be “checked in” even with a ticket shown by the customer using their phones.
You could also sell and check-in at the same time using something like https://woocommerce.com/products/square/. That way the visitor wouldn’t necessarily even need the ticket and could just get the receipt emailed to them.
Let me know if this helps.
Thanks!