Hi,
I have a house near Naples. I spend a lot of time in and around that area. I fish Pine Island Sound and also the Gulf throughout Sanibel and Captiva.
I have caught my share of reds, ladyfish, jacks, and seatrout. I have had no luck with tarpon, although they are there. I didn't target snook, although it is suppose to be good at night in that area.
I know there are some reputable guides in the area. I waded some waters; fished from the shore; and had access to a small boat. The boat was a help but not mandatory, especially around Sanibel.
I used very light tackle, including a 6 wt. fly rod. I brought Bob's bangers; surf candies; crab and shrimp flys; and clousers.
Don't forget to allow for some time to collect shells, especially if there is a storm before or during your stay. They are awesome!
October is a great time (may be the best) to be down there fishing. If you have a car, there are some other great areas as well.
If you are having trouble with finding information for Captiva/Sanibel/Pine Island Sound, you can also search on Ft. Meyers, Naples, 10,000 Islands or Marco Island. They are a bit south (1 hr.) but the same type of fishing.
I hope this helps and welcome to the board ...
Tight lines and have fun,
Capt. Ed