I have a buddy who has been living there for 6 years. Everyone at WW, including the patrol, will tell you that the best skiing is off area. The entry road from the highway is about 10k long and a short traverse hike from the top of the lift will give you a run to the road below the base area, where you either have a shuttle parked or hitch hike back to the base. This is a vast area and IMO it is not advisable to try it yourself by just following tracks, but the locals are generally very friendly and will usually let you tag along if you can keep up, particularly if you have some weed, which is also an accepted gift to someone picking you up hitching back up the road. Hiring a guide seems like it might be overkill, but if it is not too expensive you would literally see a whole new side to the area, and would probably be worth it.