I can't say for certain, but my guess is that they will still be there. They are very adaptable. We had some tornado damaged areas here in tennessee, and one area where I used to always see deer crossing the road is much like you described - EVERY tree now lies on the ground making it impassible. The now cross at a different spot. I think Turkeys will react the same way - make adjustments and keep on keeping on. Good luck.
But that reminds me of hunting in an area the day after a tornado had come through the nearby community. Just 12 hours earlier, the night before, it had been pouring rain, windy, thunder, lightening and tornadoes. The next morning and all the next day, I have never heard so much gobbling in all my life. It seemed like there was a bird hammering on every ridge. Coincidence or related to the weather? Who knows, but we managed to kill the 3rd bird we got on, and sat there listening to gobblers hammering from every direction. Anyway, just a side note.