Now that you are ready to deep drop, you need a good GPS, preferably one with detail of the bottom on the maps, such as Garmin fish maps.  You should have a fish recorder that can read down to 1200-1500 feet. Look for hills and high ledges. You may or may not mark fish. Even if you don't mark fish give it a try anyway as we have caught lots of fish even when we didn't mark anything but the ledge or hill top. Always drift down hill or from the top to the bottom of the ledge. If you drift up you most likely will get hung up and lose a lot of expensive tackle.  As soon as you find a good spot, mark it on your GPS then make several more passed from different directions to get the best mark.  Once you have a target mark established on your GPS, pull up on the mark, make a drop to the bottom and make sure you are on the bottom.  If you have drifted way off the mark before your line reaches the bottom you may not catch anything.  After you have drifted off your mark for a ways, pull your line up, follow the track or crumb trail on your GPS back past your original mark and drop and drift again. This time the bait should drift through the area that you originally marked and you should have immediate hookups.  Don't pull your line up too quickly, allow the fish to set the hooks and allow time for additional fish to get hooked. Once you get some good tugs on the line, it is time to reel it up and see what you caught.  I don't recommend using more than one reel at a time, since the boat turns while it drifts and multiple lines will twist together and you will never get them untangled. One good electric reel, rigged correctly will keep several fisherman busy and happy all day.