Hello Richi,
All the best to you and your bride on your honeymoon! In most years, July and the rest of the summer months can be a fairly off time for wind. More about that at:
http://fksa.org/showthread.php?t=500
Normal weather patterns seem to be shifting, so this year, who knows? If you can easily bring some gear and won't be totally heartbroken if you can't use it a great deal, you might consider it. There can be summer thermal winds at times along with some tropical systems. Both sources of summer wind can bring both useable and unuseable (hazardous) wind depending on circumstances. Kite gear rental aside from boards is still not that common in Florida.
From Orlando, there are kiteable beaches about an hour to the east around Ponce Inlet, Cocoa Beach and an hour and a half to the west around Ft. Desoto. As for kite sizes, I would try to cover the low end, say around 10 to 15 kts. If you could find a larger board that should help too. Anything is possible but those are the usual July wind trends here.
Have a great trip!