OK, here's what I got from UBT...
The main $2500 blackjack event will begin on Sept 26th, but the final tables won't play until Sept 29th. On Sept 30th, the Poker tournament will be playing the final table, and then on the night of the 30th will be the awards dinner or presentation.
So, if you want to just come in to play the big blackjack event, you'll need to arrive on the 25th and stay through the 30th or the 1st.
During the entire week, there will be one or two $500 entry blackjack events, plus satellites for the big one.
That should give you enough info to decide on your travel plans.