I imagine the Saskatchewan bears will either have hit the hay now, or be sitting on the edge of the bed, thinking about it.
I would say quater to November is about right, then they come out and are awake by quarter after May. However, they seem scarce until about half past May, or quarter to June.
Grizzly bears are the last guys to bed and the first up in the spring. An old boar grizzly will sometimes get up about half past January, because he got hungry, and wanted something to eat. If this happens, they are just like a grumpy old man would be, if he got up in the middle of the night; hungry, tired and in a very bad mood. Stay to hell away from him!