ANYONE booking a three-night weekend package with Belgian Travel Service (0920 467345) at the SunParks holiday village in De Haan or Rauswe Meren on 11 or 25 February can save up to pounds 150. For example, a villa at De Haan for eight people now costs from pounds 528 for three nights, including return crossings for two cars and passengers; and one for four people costs from pounds 349, including return crossing.