Dress sharp.
Going to want to look your best around all those women out there.
Yes, a lot of them are legitimate whores. But a lot of them are your regular girls that are there to wild out. And they are dressing like they're auditioning for a hip hop music video.
Plus, you don't want to go nightclub hopping looking less than tip top.
Vegas can also get chilly at night, so just be aware. Not saying bring a sweater, but don't be surprised. Then again, you'll be indoors mostly.
The daytime can be hot. And if you're going to lounge at the pool, have some swimming trunks.
It's only 3 days, so you shouldn't be too worried about packing a bunch of clothes.