Welcome aboard!
Bago can be a real witch at times. I used to run from Fondy to Oshvegas in a 15ft trihull so I know how you feel.
Basiclly you want the sustained winds to be under 10mph and from the same side of the lake you are on. West side of the lake west winds. East side, east winds.
The great thing about this lake system is that you can almost always find someplace that you can go to get away from bad conditions. If the main lake is nasty, you can always head up the river.