It depends on what you would consider a barrier. Yes, you've got to go through customs, you've got to go through the liquor board to get into that province. Then, if you're going to move it from one province to another, you've got to move it to the other liquor board.
So, yes, there are all kinds of.... Because alcohol is provincially controlled or regulated, you're dealing with almost different countries each time you cross into another province.