The best time is when you have time to go. Bears are where you find them... and while they tend to be active during diurnal low light periods, bears are largely led by their insatiable apetites. Most regions have brief seasons where there is an abundance of food... ie; west coast salmon runs, barley on the prairies, Albertan squaw cabbage, Ontario blueberry season etc... you mentioned cuts... there will be a flurry of activity at "green-up," you can see activity all day for a couple of weeks... then you will go through various berry seasons; raspberries, strawberries, choke cherries, blueberries etc... You would be best off doing some driving and scouting with binoculars (and your weapon "in season")... but just because you find bears in one location, don't necessarily expect them to be there next week... bears are amazingly intune with their environment, they have larger ranges than most ungulates and know where and when food sources will become available... so try to gain a broader understanding of what is happening in your hunting area, green-up times (south slopes first, creek bottoms etc...), berry seasons, crop schedules, fish spawns (trout, salmon, sucker etc...), calving season for moose, deer, caribou and possibly domestic animals also... bears will also take advantage of abnormal but convenient food sources, often provided by human encroachment. There is no substitute for perseverance. Good luck.