On this loop the two places where you might find high winds would be on Big Trout itself, usually out of the south or west to east AND Burnt Island Lake, usually from the west down the lake towards the Otterslide portage.Canoe Lake can have good wind but more in the shoulder seasons.If you paddle "clockwise" you will want to hit BIL early to avoid a headwind.
There is no current to speak of in the creeks, Grassy Bay, the Petawawa (if you take the northern route either way) and Otterslide Creek.If you leave BT you might want to camp on Otterslide's island so you have a short paddle back to the BIL portage and then you can be at the southwestern end before lunch and beat much of the breeze.
If you paddle counter clockwise you won't care about head winds but should pay attention to the weather conditions on the larger lakes and watch for strong winds on BT. The channel out of White Trout Lake can be quite fierce and caution is urged if you cross the channel where lots of waves pour out into BT.Either way, the area is nice and there are some lovely areas with a variety of paddling opportunities and wide expanses along with nice meandering through lush green spots.-
Jester