Monster Jam Truck Racing questions

[Expat]

I committed to taking my boy to the truck racing in Anaheim this weekend.

Can anyone answer these questions for me?

1. Can you buy tickets at the door?
2. If you have to pre-purchase who do I book thru?
3. Do different ticket agencies charge different prices?
4. Anyone been before who can tell what the best seats are in Angels Stadium?
5. Any other helpful ideas or suggestions before going?

Thanks

Mark