 Representative Dan Wolfe of Newberry, who's also a longtime member of the Mount Sunapee Advisory Committee, is hearing from the town's conservation community, an advocacy group opposed to commercialization of the state-owned ski area, and others, as the leaseholder tries to deal with peak parking overflow. Overflow of another kind appears to be part of the concern. Tucked up above the rotary near Mount Sunapee State Park are three little-known sewage lagoons and spray fields,