If you go through an outfitter, most will provide a pack for a small fee. If you choose to purchase one yourself, consider waterproof bags such as Sealine. Also consider whether you'll be camping at one site and daytripping out from there or setting up camp at a different site each night. If basecamping, just plan to get your gear there; if not, remember that you'll be carrying(portaging) all your gear yourself.
As to tackle, don't overpack. If you don't plan to use alot of plastic, you should be able to fit all you need in one double-sided utility box. Fish are aggressive in June and using subtle, finesse baits aren't necessary. Each year I go, I bring less tackle, and my PRIMARY reason for going is fishing.
A good rainsuit will be your best friend. Hope you've been in a canoe before as you'll be in it all day. I've never rolled one, but it can spoil a trip fast. A well-padded seat w/ backrest can add hours of comfort; again, your outfitter can provide these items.