This thread is turning into a "how to" combat a bear in the bush.
All thanks to those who replied. It seems to me that the experienced and guides dont hang food packs... and dont seem to have a problem.
Run a clean camp, keep your food air tight and you should be fine. Bears are naturally curious, im sure if one was in the vicinity it wouldnt matter if your pack was hanging from a tree or down on ground. In fact, protection from coons in the from of a barrel or locking cooler is advisable.