I was there in August, so its a similar time of year, but water might be a little cooler than it was when I was there. Couldn't tell you the exact depth we were running at, but we just cast out as far as we could and let even more line out before engaging the reels. Im guessing the baits were in the 15-20ft range when trolled.
As for spots, fish around any island and drop offs.
We had a portable sonar and were able to see the drop offs quite easily.
Yes, it's def a Simcoe smallie! 6.2 lber!