For my welcome dinner on 2.24.2011 I just put down my deposit at Robert's American Grille at Cowpet Bay. For a "Casual Beach BBQ" they charge starting at $28/person for the food and then you can do a drink package or you can do based on consumption. I'm gonna do consumption because I don't think it will be worth it for all you can drink for the welcome dinner.
If you have any more specific questions, let me know!