I pre-registered online, but I'll be arriving at the convention on the 24th. So my question is, is there a certain day that we're only allowed to pick-up our badges on? I'm going with a group of friends and for all of us, this our first convention. So none of us knows.
Since you pre-register online, you should be able to pick up your badge on the day you arrived (Don't forget your ID.) and they have a seperate line for those who pre-register and for those who is doing it on-site. And I'm assuming your group of friends are pre-register too since it's a Saturday you guys are arriving. Hope this helps. If not, I'm sure an official can clear it up better than I do.
You can pick up your pre-registration badge on any day of the con...even Monday if you feel like it!! ;D