Not to pile on with what everyone else is saying, but pick a sturdy tree downwind from the white oak that gives you a good view of the area around the specified tree. Also look to see where the deer sign is coming and going so you know the most probable direction of traffic.

Lastly, if the white oak is dropping acorns now, the crop might be depleted by the time opening day comes around. Take a read through PursuitHunter's blog entry on how to find the "Dominant Tree" - i.e. the tree the deer are currently eating under. Its a good and informative read.

http://pursuithunting.blogspot.com/2007/08/dominant-tree-part-1-definition.html

Best of luck this coming season.

-Reiksguard