If you buy tickets online, can you use tickets the next day? It wants me to pay a delivery fee, but I figured you would get an email of the tickets. Don't want to spend the money and not be able to use them...

Yes you can and they can look it up for you by your name.

They can look up your tickets by your last name. I didn't even need a code.

Yes. And when you arrive they have a booth specifically for online purchased tickets. For pickup.

Yes you can. They're not set for any particular day besides weekend versus weekday tickets but it doesn't limit you to day of purchase