Re: panama beach
You might get your butt kicked with the 6wt, especially if you hook into a bigger snook or red (which can be in even the skinniest of water where you think you're only targeting little ones). When I fish the Gulf, I use my 8wt, but I know a lot of guys that go bigger. But if the fiancee wants to do deepwater, see if you can take a guide to fish for billfish. The fiancee can do the deepwater she wants, and you can go after one with a fly rod!
Working out a way to convince my university to allow me to hold my TA office hours on the nearby creek...