The registration period begins soon for Allagash Wilderness Waterway campgrounds in northern Maine. Registration will open at 8 a.m. on Saturday, Dec. 8, at the Chamberlain Bridge ranger station. The Allagash Wilderness Waterway is providing winter campgrounds at Chamberlain Bridge and Kellogg Brook in the preserve, a 92-mile-long ribbon of rivers, streams, lakes and ponds that winds through northern Maine’s forests. The 48 camp sites available at Chamberlain Bridge and Kellogg Brook will be allotted on a first-come, first-served basis until the campground capacity is reached, which could occur as early as noon on opening day. The sites are popular with ice fishermen. Rental fees plus meal and lodging tax are charged.