I am a Bowhunter as well as a biker and well tell you guys that ALL of the hunters (non bikers too) that I know of are FULLY aware of the designated trail system here in Michigan. For obvious reasons, any hunter who is serious about his sport AVOIDS our designated trail system like the pox!! As long as you STAY on the posted trails you are encouraged to ride ANYTIME!! IMH, riding this time of year actually helps BOTH sports because it helps "newbie" hunters get accostumed to sharing the land as we bikers must do! Just do us all a favor and STAY ON THE TRAIL (unless your street legal then all the forest roads become a virtual play ground). Also, keep your bike within legal sound limits - this is a MAJOR!!
NOW GET UP HERE AND RIDE!~!!
Woodsy