My husband and I just returned from 16 days in Belize on Sunday. It was the greatest trip we have been on. While on Ambergris Caye, we stayed at Capricorn Resort, and it was fabulous. There are only 3 cabanas, and I believe they said they had room available the next few weeks. It has the best restaurant on the island and the hosts, Anabel and Clarence, are wonderful. The staff couldn't do enough for us, and we felt so welcomed and relaxed. The cabanas are right on the beach with Queen size beds. There is a hammock on every cabana's porch with a view of the sea. The Island Ferry stops regularly at their dock to bring you to town, or to other restaurants (though you won't want to eat anywhere else!!!). There email address is capricorn @btl.net and there website is very detailed.
Good luck and Congratulations!!!