Going to Sandal's Dunn's River Resort in Jamaica, how can I call home?

I'm stuck and if anyone can help, it would be greatly appreciated!! I need to call back to America from Jamaica, and don't have any clue how. I've heard that you can call back from the resort phones but there is a connection fee of $50 on top of minute charges. I'll be making at least 3 calls a day, for 5 days, consisting of at least 20 minutes a call, that is out of the question. Cell phones are out, and I've heard that calling cards are useless. What can I do?