I'll fish bowls that bottom out @ 300-350' or humps that top off around 250-300. Don't drift deep > shallow, try to set it up so the baits are goin down hill, you'll tend not to lose as much. As soon as you hook into a fish MARK IT ON THE GPS WHEN IT HITS! Then set-up on the exact same spot again. After a while, the waypoints will tell you where the fish tend to hold on that tide, on that piece of structure.
Tidal flow CAN be a *****. The best way to deal w/ it is to have a plotter on board and back-trolling into the stream, trying to maintain on top of the structure. Doing this with only a sounder is near impossible.
Try searching the forums history. There's PLENTY of insight on here about Hali structure/fishing from many good lip-ripping members.
Barry IS a rock pile that does have bottom transitions. The only real way to figure it out is to put in the time and keep a watchful eye on the sounder. Again, a plotter is extremely helpful for combating this.
If gear is a worry, I'd try sticking to things out front of the airport or Taylor. Both spots can be plauged w/ pup's, try to keep the baits moving. Go and set-up on the EXACT same spots that you've caught fish before.
If you're on spots that guides are fishing, you ARE on the spots. This is why I'm focusing on the technical aspects. I get the feeling that you spend more time fouled up than you do fishing.
Another handy tip is to ensure that all rods are configured in the same fashion. This way it is easier to maintain lines that have the same drag in the water... Same line type/test... Same weight (not just poundage but style also)... Same rig - Spreader bar or jig. Everything the same! Set up the weights so that in the event of a snag, they can easily be snapped off.
If you insist on fishing the rocks... Keep your eyes GLUED to the sounder and your crew OFF of the bottom. Many people think that they need to POUND it, not so. All thats needed is to 'feel' for it and adjust things accordingly. If the TV tells ya that things are getting shallower, have your people haul up a bit until things stabalize, then sink em again. When going deeper, have your crew hold their tips IN the water and spool out slowly. As soon</u> as they make contact, thumb the spool and raise the rod QUICK! Then engage the cluch and get comfy but never relax. The baits don't need to be dragging on the oceans floor.
In short; Fishing in the rocks is</u> fishing in the rocks. New areas ARE a PITA to figure out but the rewards can be GREAT once accomplished.
That island you mention, I've never heard of it before. I'd guess that it's un-named and would look like a laidies slipper/shoe when viewed from a certain angle. I wouldn't be to worried about it. I think that you're better served exploring and learning the stuff that you've already scratched. Each and every area changes dramaticly pending on wind and tide. Hence why the fish are holding on one spot one day, and another the next... Usualy this can be just on the other side of the hill.