First, I have never hunted any ground that been thru a control burn. However, I have done some reading on this, and studied it a bit when I was in Montana. What they have found is that a controlled burn really helps with the natural habitat and provide tons of new forage. While you may have lost a known bedding area, they have provided you with a new food source. All the new tender growth is like a buffet for them. It may take you a while to figure out the new pattern, but I don't believe this really would have hurt you at all. Spend a little time getting to know the ground again and I am sure you will be back on them in no time. Good lukc!