Here is the CORRECT answer for Michigan.
ORV operation is PROHIBITED,
*In public hunting areas during the Novemeber firearm deer season, between the hrs of 7am and 11am AND from 2pm and 5pm, EXCEPT for,
Going to or from a residence or hunting camp that is inaccessible by a conventional vehicle [subject to State land regulations]
On private property, with the landowners permission
Passenger vehicles while being operated on roads capable of sustaining automobile traffic
ORV use on designated trails is limitied to vehicles 50 inches or less in width.. Off-trail or off-route operation outside of a designated ORV area is prohibited EXCEPT for licensed hunters to remove deer, bear, or elk at speeds of 5mph or less.
Persons who have been issued either a Sec of State handicap license or placard are exempt from the quite hours of operation during the Novemeber firearm hunting season, IF they are using their ORV in conjuntion with hunting or fishing.
So, what does all this really mean? It means that essentially, you may load your ATV into the bed of your truck, drive down a forest trail [not posted as closed] and park it so as NOT to block the roadway/trailway. WALK back to your blind, and shoot Bambi. Once you have LEGALLY tagged your dear, bear or elk, you can walk from your hunting spot or blind, back to your truck, unload your ATV, and use it LEGALLY at anytime during legal hunting hours at speeds of under 5mph, to go RETREIVE your kill.
National Forest rules may differ, check with the local forest manager first.
Any further questions, call my office.
DIRECTOR-Mich ORV Safety Assoc [ M.O.R.A ]