If you can locate where currents twirl because of tidal flow and meet and cross because of coral reefs some hundred or more yards away, you will also do good for bigger fish. Snorkeling is a good way to check out a spot. Fish tend to congregate in spots, very narrow circles. Usually because of current causing feeding patterns to fall out from floating microscopic larvae. Not discernible to the human eye, but these concentrations are where the schools stay.
Fish are intelligent.
You use a trolling spoon and get one or two bumps without a catch, you might as well give up, they have told everybody else. Fish bait is best for towing. Same with school spots, the fish will watch 4 or 5 fish get caught and by then have caught on and told everybody, you have to move again. Inside handline fishing requires constant moving from spot to spot. Porgy fishing is good usually about 150 ft back from a coral patch.