It's the Law—Iowa's Snowmobile Laws
Firearms on Snowmobiles

A person shall not operate or ride a snowmobile with a firearm in the person’s possession unless it is unloaded and enclosed in a carrying case. However, paraplegics and single or double amputees of the legs may hunt from a motor driven land conveyance such as a snowmobile. “Paraplegic” means an individual affected with paralysis of the lower half of the body with the involvement of both legs, usually due to disease of or injury to the spinal cord.
[IAC 571-98.2(2)] Turkey and [IAC 571-106.7(4)] Deer.

Don’t Trespass! The operation of snowmobiles on private land is subject to trespass laws and permission must be obtained.