There are seven campgrounds on Fanø, virtually all within walking distance of the beach. All are family focused and most have cabins for rent. For more information, see www.visitfanoe.dk (also good for hotels, B&Bs and private rooms and apartments for rent).
For information on booking summer holiday apartments and houses, contact the tourist office. There are booking agents (eg www.danibo.dk), but their websites are generally only in Danish and German.