Do I Need Fantasmic Dinner Reservations in August?

[Julia M]

We will be in WDW the second week in August. We will want to see Fantasmic, and I'm wondering how important it is we make dinner reservations.

How long will we have to wait in line and then wait in our seats, if we don't make dinner ressies?

If we do make the dinner reservations, how early do we have to get to the theatre?

We did the dinner reservations when we there last, in April 2001. Is August as crowded as Easter break?

Thanks

Julia