I would reach out to Orion the Iguana Hunter who is on AGN and YouTube. Orion is an expert at hunting iguanas and should be able to give you some advise on where to find some to hunt.
I'm in the same boat too. I'll be in South Florida on Nov. 20th-24th. If anyone has any leads, please give me a holler. If you ever come to Tampa, I'll trade you a fishing trip aboard my boat for the iguana hunt!!
Iguanas are along most of the waterways in south Florida these days . Small boats are good for hunting them but be aware that you may be stopped by the police since you are supposed to have a good backstop and not shoot pellets into peoples yards. More important is the weather since they come onto land when the sun is shining brightly to warm up.