The easiest way
to handle walk-ons is to have a computer, tablet or smartphone
available at the check-in table that walk-ons can use to register. All
you need to do is provide registrants with the invite code.
If you do not have internet access at check-in then as a backup plan have them sign a legal release form and provide their email address and other contact information. Then sign into athletechs.com and create an invite.
Please see Using Invites to Manage Late Registrations for more information.