We're getting ready to full time next year and have our rig on a seasonal site in
this campground. We like it a lot.
All sites are 30 x 60 and all are 60 degrees to the roads. Roads are gravel, well maintained, and wide. There's a terrific pool and covered pavilion as well as a first class recreation hall. Free wi-fi is available in the rec hall and office area (little wireless routers with limited range). It is a very popular local campground as it is attached to over 12 miles of ATV trails and a state park is accessible by these trails with more miles of trails.
Fear not! the quads are not allowed in the campground. There is a special quad 'park' on its outskirts. The campground is actually quite quiet as the atv folks are gone all day. It's really fun to see some of the kids all decked out for the trail. Very serious stuff!
One caution, approaching on rte 119 from Brattleboro VT looks good on a map. In real life, not so much. You have to go over two very narrow truss style bridges with low corners in their overhead structures. To make matters worse there are tight turns to be made exiting the bridges. I've never seen guard rails with so much vehicle paint on them. I suspect many a trailer has rubbed its way around the curves.
It's worth a roundabout approach from the south with all very good roads and access from that direction.
If you get there in 2010 look us up. We're the only Big Sky there (so far).