Best Beer stores in vegas for craft beer?

[thedingo]

Hi guys and gals.
My sister is traveling the states this month and will be finishing there trip off in Vegas. They have a healthy luggage allowance on the way home and said they could bring me back some beers.
Looking for the best store they can walk into with no knowledge of beer and get helped out by staff in getting me some top beers. Possibly some beers from small micros nearby?

 

[ReverseApacheMaster]

I would also like to know where good beer can be bought in the bottle in vegas. I usually do carry on luggage but I might make an exception to bring home some beer.