So you have 5 weeks til Vegas... how much muscle do you think you'd be putting on in that time (assuming perfect adherence to both training and diet)?

Because realistically, no matter what kind of hypertrophy specific training you do, 5 weeks time isn't going to amount to a massive change. Especially if you're trying to minimize your fat gains at the same time (if you are trying to do that... typically a Vegas va-ca means showing some skin ya know?).

I'd say your best bet would be to stick with rep ranges that fall within the strength and hypertrophy ranges instead of trying to shorten the cycles of whichever hst program you're looking at.