As beautiful and exotic as St. Lucia is, it's unfortunately a tough fit for a typical incentive trip (3-4 nights). The main reason behind this is the distance between the airport and the hotels. There are only a few hotels who would be a good fit for any incentive trip over 50 rooms. These hotels are within a one hour drive to the airport, have over 75 rooms, have multiple dining options, and can be accessed by boat to provide day activities. Also due to the topography and roads within St. Lucia it makes transportation for dinners, activities very cost prohibitive. Pricing for transfers can be almost 60% more than most Caribbean islands.
The island does boost an impressive collection of boutique hotels that target honeymoon and romance travel but these are high budget experiences with only a limited number of rooms.