Weed in canadian airport? Vegas dispensary?

I'm going to Vegas for new years and I have a couple questions. Can you smuggle weed on a plane? How would you do it and what are the risks? Not to smoke on the plane just while waiting for connecting flights and once I land there. I heard there's a good dispensary there called pisos. Is it true you just need to show your ID to purchase? Do they scan your ID or just check to make sure you're of age? Are the prices and quality of flower there good? Thanks in advance guys any cool recommendations of places to visit while I'm visiting would be dope too