Float tubing is very enjoy able even if you caught only caught a few fish. Try using a 3'' chartreuse, clear/ w red flake, or a rootbeer colored grub on a 1/4 ounce darter lead head. I always get more hits adding Pro-cure Calico Cocktail bait sauce. Cast your line near the pilings of the docks where the fish hide. I also think that the harbor has a Bait barge where tubers and kayakers get lots of croaker, bass, halibut, wsb, and barracuda. Just look for the best spots and get comfortable with harbor and you'll get more fish.
Anthony