I guess I will say it, watch out for the grizz's! They are up high and down low on the BLM lands, if you have never hiked/hunted/camped in grizzly country you will need to study up on precautions and safety. Hunt with another person, this is the reason I have not hunted F yet...can't get anyone to go with me.
I have not hunted F, but spent some time in their scouting/hiking around Sunlight Basin and the 105/106 area. I would concentrate on the higher elevations if weather allows it, lots of trails to hike in on and the further you get from the road hunters the more deer your likely to run into. I seen a few doe and a couple small bucks, but I was hiking in the middle of the day in late Sept and it was warm.
Study google earth and buy a chip that has basecamp on it, then you can view your selected area in Google earth.
If you have 7 days, then I would try my best to spend all 7 of them in the same general area. It will take some time to find the deer, if you drive all over the place you do stand a chance of finding some but I subscribe to the thought of getting to know an area deeply, especially if you plan to hunt there again.