I called up today and got some clarification. If you pre-register, you pay $30 and you're covered for BOTH DAYS. It's NOT $30 each day.

If you don't pre-register, it's $40.

Even if you only play 1 day the price is the same.

They're expecting 100 on 100 battles on several fields at once (different missions in the scenario.)

Here's the link again.

Any idea what side you guys would prefer? I'm thinking about pre-registering and saving 10 bucks.