Thanks a lot Guys! Yeah, sure, I have pretty good electronics on the boat :-). I wouldn't go blind into waters like this - it's a recipe to come back no prop or skeg :-). I am just trying to prepare the spots in advance, and know which general direction I need to head once the boat is on the water. And I do fish a lot in Georgian Bay but other areas, some are pretty rockless, some I need to be more careful with. From my previous experience being at Killarney without a boat, it looked like there might be many dangerous hidden rocks, which means I will have to go slow from point A to point B before I put on my trolling motor.
Thanks a million again for the tips!