It can vary. If I recall though, that promo is only Sunday-Friday, which would rule out the Saturday for you.
Opening night last year (which would be the 6th for this year) was $89.99 plus tax, the first Saturday was $109.99.
We did Express on opening day last year and got through all of the houses, but we did also take advantage of the Annual Pass stay and scream area, which got us in an hour early (I think - it's been a while!).