The dive shop we were Open Water certified in, Depth Perception Dive Center, runs some Gulf Dives. They have a calendar online, depthperception.com. Have not looked at it, but if they do not have any that weekend, google some shops in Clearwater that make runs to the Sheridan or the Blackthorne. They are in around 80ft of water. About the best wrecks close to Tampa that I am aware of, other locals may know of better though. Safe Diving!
john