I don't see the difference in bulk tobacco and a pouch, there's a difference between a tin and bulk, but the only difference between a bulk and a pouch is the bag it comes in. Customs agents enforce customs, if you try to bring tobacco across the border and not declare it and they decide to search you and you get caught, prepare to get fined. Considering the fact they just uncovered an al-queda terrorist plot in Canada and as well the boston bombing, I wouldn't be taking any chances at the moment. You could cross the border, stay 24 hours I think and bring back 4 pouches if that's worth the trouble to you, and then I don't know where you can definitely buy pouches of said tobacco when your in the states.