If your invitation says "and Guest," then yes, if not, we would prefer if it was just you.
Garden/cocktail, please. It's outdoors during a Florida "winter," we want you to feel comfortable -- if those shoes are uncomfortable or that top button is too tight, let it all hang loose.
Yes, check out our Travel page for all of the information you need.
If the invitation includes "The __ Family" then we've prepared to accommodate all of you!