All the sites in the Pine Grove campground have 50 amp service. It's very big rig friendly. Sites in the River Campground have recently been converted to 50 amp but many of them are smaller and not big rig friendly.
If you try and reserve a specific site it shows Amenities. So yes it does.
AMENITIES
Camp Fire Allowed Yes
Drive Way Length 56
Drive Way Surface Gravel
Electric Hookup 50
Electric Hookup 50 Yes
Electric Hookup 50
Grills Yes