Congrats!
Gazebo will be awesome!!
My wedding is Nov 2012 - but i won't be using Arrecife - I'm bringing my own from home. Just getting much more value for my money that way. But personally if I was using them - i woudl definitely pay for the dinner/reception. You will probably want some nice pics of your first dance and cake cutting!
I've eated at Gran tortuga on previous holiday and i thought it was great. Food was really good and there's plenty to choose from. I believe they had some side dishes up at the salad bar too (rice etc) - so don't worry your guests should be plenty full.
The green/red card is just to tell the server if you're wanting them to come around with more meat on the swords or if your done.
i agree 100% about Jazmin! My wedding is 400+ days away and she's still taking the time to reply to my questions. I honestly didn't expect much from her till next year. Soooo nice to have a WC who is on top of things!