Baffin is indeed a pretty isolated area to tackle by yourself. I used to wade fish around Mustang Island and Port A quite a bit. Here is a listing of some good spots Kayak and Fishing Page
and some more GORP - Fly Fishing the Texas Coast - Redfish Bay
Make sure to shuffle your feet, plenty of rays down there.
If you want to learn from the best, book a trip with this guy- Fly Fishing South Padre Island Texas with Captain Eric Glass