As a Canadian and a bear hunter that has did my own bear baits, it is a known fact that the more blackflies the better hunting. Now you never exsplained if your hunting baits or not , but I would say I would pick a week near the end of the season if your hunting baits. At the start of the season bears forge for food and a population can be higher at the start as every bear will hit a bait. If a dominate bear finds a bait over time and stays with it , it will fight off most smaller bears from the bait. He will tend the bait more regularly after time.

It can take a week to get a good bear, If you can stand it , do not ware bug repellent. Thick pants ,gloves, mask ,tape opening around the wrist where bugs can get in. Being still is another smart hint in Bear hunting. Hope this helps ya...BT