i've caught fish at the split using sprat as bait.
i've caught fish elsewhere in belize using frozen, defrosted shrimp.
snapper loooove shrimp.
i just use a baited hook + bobbin = handline.
i was taught by a friend on tobacco caye and have had some pretty good luck at times for an inexperienced fishing type.
just at sunrise is a good time to go. be careful at the split---lots of stuff under the water for your line to become tangled on. i've spent my share of time diving to retrieve my hooks!