The campground is called "Camden Hills State Park"
Steven's Corner is on the opposite side of Camden Hills State Park (from the campground)
The parking coords are:
Main Campground (Easier hike) (Parking Area) N 44° 13.809 W 069° 02.948 Steven's Corner (Parking Area) N 44° 16.800 W 069° 02.687
Snowmobiles can come from either side.