Mail. My friend who lived in BC used put a sacs into empty opaque shampoo or bubblebath bottles, anything with a strong scent and ship em to friends here in the US. One time one of the packages had been opened and searched, probably at random or something even though that's probably illegal now that I think about it, and they either didnt find the weed or didn't care because it got here alright.
My friend brought an eightball on a plane one time. Dunno how she pulled that one off but shes lucky. that's not too smart.