Always check first with the LOCAL guides/anglers/tackle shops. That goes for Boundary waters, or any other waters. Get the numbers of the locals, and ask them what those particular fish are biting at that time of year. Second best is checking for any on line fishing reports for those waters from the past year. Most reports are by those happy anglers who had success. Those are the ones who you want to talk to.
The more people you talk to, the more you'll start to hear a pattern emerge. They will tend to repeat the names of that handful of lures that they trust to produce results. It will take some time to talk to a few people. But I prefer to have five locals tell me, for instance, they all are successful using a white 3 inch twister tail on a 1/8 ounce wide gap jig, rather than buying or making five or ten different lures in a range of weights, sizes and colors.
This actually happened to me planning a trip to Canada. I asked somebody in Chicago what to use, and they told me to bring DareDevils. So, I brought four patterns in 3 different weights. Of those twelve name brand lures , only one size and color worked. And when it did, it only worked about 1/3 as well as the similar lure they were using. It was called a Jack of Diamonds, which was identical in size and color, but it was made of different metal, which gave it it's own action. I borrowed one, and caught more fish than I have ever before or since.
The next day, I went for smallmouth, and got three Manitoba Master Angler awards on one lure - a Rapala SR08 Perch pattern Shad Rap. I brought a small fortune in tackle, but only used two lures. Crazy, but true.
So whether you do it while you're still at home, or wait until you get there, ask the locals. If you wait, they are likely to be more helpful if you buy tackle from the local shops.