Well, Canadian Customs at YEG turned out to be pussy cats today rather than paper tigers as I declared how many bottles I was over, which was 4, the approx cost and they charged me CAD$16 for overage so not a hefty surcharge at all. Can't speak to other entry points but YEG CBSP staff was quite pleasant. Would recommend the practice to any travellers possibly wanting a liquid Argentinian souvenir to take home.

And thanks to Gaucho for his input and time helping me with my Malbec souvenir ^ Should travellers want his input he is very giving of his time so would suggest dropping him a PM.