Bring or leave my 3 month old to a destination wedding

I'm conflicted with a very difficult decision. One of my closes (best friend since high school) is getting married in Costa Rica in November. She asked me to be her bridesmaid and of course I want to be there for her big day BUT my baby girl will by then be 3 months and 12 days if she's born on her due date. It breaks my heart to think that I might have to leave her with grandma ( which I know she'll be in great hands) but it's not the same as her mommy and she's so little. I would only go for 3 days literraly just for the event. I been thinking about bringing her with me but my husband is oppose to it since she will be so little. He doesn't like the idea of her flying and being in such a hot climate.. What would you do ? Any advice ?