What about smilax auriculata (common greenbrier) for deterence and vine? You could also use the saw greenbrier, I think the leaf is prettier, but that's up to you.
I have no suggestions for a sunny area, perhaps someone else has more experience in that dept. and will help.

Here is a link that might be useful: Some native Florida vines

This post was edited by MsMorningSong on Sun, Jul 13, 14 at 13:32

If you want to attract butterflies such as Zebra Longwings or Gulf Fritillaries you should plant some kind of passion vine. Those with blue or purple blooms seem to work best. If you want to attract hummingbirds I suggest the coral honeysuckle. It produces very pretty red blooms and also gets visits from some butterflies.

Passion vines tend to grow quickly and will get long and bushy in a hurry. The coral honeysuckle is very well behaved. It your zone they will be perennials.

Here is a link that might be useful: Passiflora incarnata