Lynxair [http://www.lynxair.com/] flies to GTMO four times a week for the fixed price of about $450, roundtrip. Children under two fly for free, only paying taxes and surcharges.
Air Sunshine [http://www.airsunshine.com/] also flies from FLL to GTMO four times a week for the fixed price of about $400, roundtrip. The airline flies twice a week to Kingston for under $200, roundtrip.
There is a small souvenir stand within the camp itself, selling small items to take home. These include goggly-eyed small fluffy toys, and clothing featuring the phrase "I went to Guantanamo Bay, and all I got was this lousy T-shirt. Allegedly."