Big Bay Campground

Stayed here early September, 2016. Superb!
Wood bundles cost $5, bundle your own

Pros:
-Get to take a cool ferry out to the island
-Outer loop sites are indeed private! (Thanks, Suzy)
-No road noise or light pollution! Quiet, and dark.
-Many recycling receptacles, even for propane canisters
-Outrageously beautiful beaches, with short walks/hikes (~quarter mile or less) to access them
-Small grocer, laundromat, coffee shop, souvenir shop, and post office all easily accessible at the ferry landing

Cons:
-Ferry trips can get expensive; round-trip for a vehicle and two passengers will run around $50
-Stowe all foodstuffs, as the raccoons (trash pandas) are plentiful. While not aggressive, they will sneak up on you in the dark.

You'll need to catch the ferry (auto and passenger) from adorable little Bayfield, Wisconsin. It takes about a half hour to cross to Madeliene Island, and from there it's a short drive to the campsite and Big Bay. The campsites are basic, not very scenic but decent enough. The outer loops are fairly private, with enough trees and vegetation between sites to keep things personal. Our site -- West Loop 047 -- had a small stream in the back, but nothing so big that mosquitos were a problem. Try to find an outer loop site for maximum privacy. There are nice bathrooms and showers at this campground, and a cozy little visitor center/park office, with souvenirs, interesting books to check out library-style, and friendly staff.