My friend's lamented checking luggage to import booze for a weekend in Las Vegas. No. My mother, who is a professional gambler, always told me, "Scared money never wins!" So don't be a cheapskate in the City of Sin. Go buy your libations!
Walgreens had everything you need to fully stock your bar and at decent prices. Spirits, beer, wine, mixers, and even a foam cooler to get your party started.