Quietest Trailhead

Find the trailhead with the smallest total number of recorded hikers.

A national park records how many hikers enter at each trailhead during the day. Each visit record contains a trailhead name and a number of hikers. Add the hiker counts for each trailhead. Return the trailhead with the smallest total number of hikers. If two trailheads have the same smallest total, return the name that comes first alphabetically.