MikeRDar,
I've been wondering which wetsuit to wear. I thought I'd call the dive shop the day before and find out what they were wearing on the Friday trip before. I've got a 3mm and a brand new 5mm, which I bought when diving off Kauai this past February. Think I'll pack them both.....
I'd just take the 5mm. You can always flood it if you get too warm but if you get cold (in a 3mm), well, you are just cold.