When it comes to public land, there's no such thing as getting there too early. Where I hunt, guys will usually head on down the road when they see your truck parked nearby. Hunters on top of hunters just messes it up foreveryone. LikeVS said, if you have company, get in there further and tuck yourself between bedding/feeding area. But if the buck is worth it, make sure you're the first guy in that parking spot!