A private tour is worth the extra money in winter if you're a family, travelling with someone who has limited mobility, a photographer, or a group of four to six. You get hotel pickup and the first 10:00 castle slot. Your driver can switch viewpoints if Mary's Bridge is closed, and waits nearby when the shuttle bus isn't running. Know two things before you book. First, some "private" listings are a driver only, with no castle tickets included. Second, no outside guide, private or otherwise, may lead you inside Neuschwanstein. You see the interior only on the official castle tour.
Winter changes the maths on private tours. In summer, a big coach tour and a private van reach the same crowded castle. In winter the day is short, and it's dark by around 16:30 in December. The shuttle bus often isn't running, and the bridge view may be closed. Control over your timing, pace and route is worth more on a day like that, and a private tour gives you that control.
The calendar above is for the All Things Bavaria private tour, our all-round pick below. To weigh private tours against coach, train and van days, see our winter day tours compared.