West Africa estuarine tarpon

I'd like to talk to someone about estuarine tarpon behaviour. I've been going to West Africa for a few years and we are just starting to figure it out but so far have only got one tidal slot when we catch reliably. From what I can tell from the internet it seems a bit like Boca Grande but muddier. We have a slightly rough bottomed slope going from 35 to 70 feet cut through with a few "canyons". What we observe in our limited experience is that the fish come up on the end of the incoming tide as it slacks off. At this time the surface water is clear saltwater having pushed back the muddy river water. We think they are moving up out of the upstream hole to feed on baitfish and we always see surface activity in varying amounts before we hook up. Because so few people know what they are doing not many fish are landed. My friend and I practice catch and release anyway but this season so far had about twelve fish between 150 and 270 lbs by length and girth measurements, nothing smaller I swear, and at this time of year (Dec/Jan) and in that place, that's about the size we've seen on the surface aswell. If we got one long enough and fat enough to break a record we might bring it in if IGFA rules have been followed. There are definitely 300+ fish here. We're using livebaits on Owner 5111 SSWs dropped back into the hole from the boat at anchor on the beginning edge of the slope, or we use suspended livebaits at various depths, or both. Tides run at up to 4 knots.

What's the best way to fish these murky waters and where the hell are these fish the rest of the time? Are they the same "stock" as yours? Do these stocks mix in mid atlantic? Anyone point me at some good reading material? Got Frank Sargeants classic already. Looking forward to hearing from you.

Tjaman