Aug 11 is a long way off.
I would not be worring about that too much right now.
Asking helps, but the proceedure may change by the time you get a solid offer or they may fudge the paper work.
My bad, I forgot that she can be under your sponsorship initially, but I strongly recommend to consider to leave here at home for the first month as you will be running around like a confused drunk trying to work out where anything is and how this place works, and so may increase stress levels unessasarily.
Also, you want to see what your roster entails for the second month, because if you are lucky, depending on your position, you may get a sim/type class very soon after(?) and then will have to leave her for 6 weeks.....
better she comes when you are slightly stable, know how to get some things done here and then the transition is smoother(if you can call it that).....
remember, happy wife, happy life....... apllies 10 times more especially here!!