Tronny,
You should be pretty safe in a canoe in LTB. North and south winds aren't a problem, but I've been winded on NE winds, and because of the geography, west winds, although the waves won't betray it would make you think you are paddling in a wind tunnel, no fun!
That being said, if you head west from the launch, fishing can be very productive long lining just about anything you want early in the year. Going east, tuck around into Cloud Bay, you never know what's going to jump on the end of your life in there.
Just check the forecast before you go. There are camps at the west end of LTB so if things go bad, someone is likely to see or hear you.
Tight Lines!
AB