I haven't fished for any schoolies yet but I'd imagine they are trickling in.
There are a lot of specifics. Too much to post. In general, look up the greased line swing, slipping drift, etc. The traditional (steelhead/salmon)floating line tichniques are refered to as greased lining since flyfishers used to put "grease" on their silk lines in order to make them float.
Jock Scotts book, Greased Line Fishing is very old, but it is the authority and original work on floating line techniques. The stuff in it can be directly applied to fishing the salt.
Sink tips are one way to make it work, but you can also fish deep with an unweighted fly, long leader and floating line alone. In general, casting further upstream and mending your line to keep the current from dragging your line and fly will give the fly time to sink and fish deep. Sort of like bucktailing in a rip. The further upcurrent you cast, the more time the jig has to sink.
I do use split shot on the leader at times as well. It gets things down a little faster when necessary and allows me to continue to fish an unweighted fly a little deeper. Unweighted flies are great because the will hover and move with 6 degrees of freedom. The split shot does not inhibit that either. Weighted flies tend to give a jigging action and need to be moved or pulled to maintain depth. They have their time and place though.
If you want to know more I'll be happy to tell you what I know. Maybe in a PM as not to clog the forum with my ramblings. Or maybe I'll go ahead and clog it.
Let me know.
Tom