TJ I've been on numerous flyins and although I haven't been personally checked (on a flyin) about four or five years ago we had a plane land which had both a CO and OPP officers on the plane, they checked three of the four boats in our group and also checked the cabin freezer without anyone being present in the cabin, seemed they were only there to check for licenses and possession fish which our group was good on. They didn't make an issue about beer in the boat at the time which they could have, but I have a feeling that if the same thing happened today they wouldn't look the other way about the beer. We've had a CO waiting at base camp on our return from an outpost to check creel limits as well with no problems.
From what I've heard and read this happens more in northwestern part of Ontario, just my opinion.
Fisheyes is correct too about Co's coming into outpost camps and checking cabins without permission or warrants, there is a certain CO that likes to visit Sportsmans Lodge and Anglers Kingdom north of Red Lake, it happens every year.
Last year we were stopped by CO's and OPP's just south of Ear Falls (HWY 105) and they were stopping everyone going south for a fish check again no problems for us (no fish) but they were writing tickets to everyone not in compliance with the regs.
doack I'm not going to tell ya that it's not impossible for you to get a visitor but then again the chances are slim.
Good Luck on your trip and I hope you enjoy yourself