from the Dept. of Natural Resources website under property regulations:
312 IAC 8-2-3 Firearms, hunting, and trapping
Authority: IC 14-10-2-4; IC 14-11-2-1; IC 14-22-2-6
Affected: IC 14-22-11-1; IC 35-47-2
Sec. 3. (a) A person must not possess a firearm or bow and arrows on a DNR property unless one (1) of the following
conditions apply:
(1) The firearm or bow and arrows are:
(A) unloaded and unnocked; and
(B) placed in a case or locked within a vehicle.
here is website if you want to check further.
DNR: DNR Home