That would make for a long drive. During the rifle season, there are a lot of road hunters and ATVs. Vehicles are prohibited off road there (even to retreive downed game), which generally makes it a little easier to get away from the crowds, although some of the ATV hunters "forget" about that rule. I have driven around quite a bit up there during the archery season (not while hunting), as well as scouted, and it doesn't seem like there was that much traffic or that many hunters out. In December, we were up there for a rifle (cow) hunt and saw quite a few people driving around, but never bumped into anyone off the road. However, it was only a 5 day season, so I think everyone that had a tag was there at the time. Since the archery season is longer, you might not see as many camps/hunters.
If you do decide to go there, or if you get drawn, feel free to e-mail me for more info.