Well around here the hunting season runs from about September 1 to December 1. So if you don't ride in hunting season you lose some valuable biking season. Most hunters around here are aware of mountain bike trails and careful of bikers. Sure, there still could be an accident and bikers should take reasonable steps (such as bright colours) to minimize the risks.

There has never been such a hunting/biking accident in this province as far as I am aware. So I think getting hit by a car or fellow biker is a far more realistic risk to consider.