Mac's are a true quarry that is for sure, I have done my best jigging under a school of Kokes. Once while trolling for Trout at Odell lake in the Spring along the south east shoreline, I picked up my largest Mac...they will eat like most fish- opportunistically. I do troll deep for them but most of mine are from jigging lures that resemble the pray. Good luck and tight lines.
It is each anglers responsibility to understand the difference and be able to identify each fish they catch. If you look in the synopsis it will show you and explain the difference between the two. Once you have seen one it becomes much easyer to tell the suttle differences.
ODFW and OSP have a saying "if in doubt release it", the Bull Trout is listed on the federal list and if you make a mistake and harvest the wrong fish it will be a very steep fine.
I can attest that dredging bottom with a down rigger is not the easiest way to fish for lakers. It is certainly one of the best ways to do it, but the easiest is jigging. You will definitely want to use braided line to a swivel to 4-5 feet of flouro leader. The depths that you will be fishing at, if you are using mono, you will never get a good solid hook-up due to stretch. But, also remember that with braid, you can easily rip the jig out of their mouth if you put the "bubba-bass" hook set on 'em.
+1 on the jigging below bait pods. Also, do not be afraid to find submerged humps that are surrounded by deeper water. They will lay on the humps waiting to ambush bait that gets funneled over to them. Just drop a jig to the bottom, let it rest, then just twitch it a few times, then let it rest. Rinse, repeat. They will often attack it as they think it is bait that is dying. Get ready for a wild ride.
All good advice for makinaw fishing. Probably some big chinokanee on the finder down on the bottom along with other fish. before i sold my boat the finder would show them down there. land locked chinook in the bigger sizes are hard to catch but once you figure it out it should be easy. just remember to call me when you do since i tryied a bunch of things and haven got any of the bigger ones.