Simpson Bay Resort and Marina, located on the Dutch side of St. Maarten is running a HAUT deal today (savings of 45%!) through hotels.com (expires at midnight). Travel dates are from November 13th to the 17th for the affordable price of $94 per night. Though not an all-inclusive resort, the grounds are home to several restaurants, bars and a casino.
I spent some time here back in April and it is a family friendly, LARGE (there are about 9 buildings I think) and modest resort. If possible, try to stay in one of the renovated buildings. Nevertheless, St. Maarten is a beautiful island and a hub for island hoppers (visit Anguilla, St. Barths, or Saba - see my post here on Saba- by ferry). Oh and another thing - Don't get sucked into attending one of the timeshare sessions!!