A game camera would easily fall under the catch all "personal gear" or "equipment". Some areas other hunters are quick to report any stands, feeders, cameras, etc. they see, especially when one pops up on a spot they have been legally hunting for years. Don't shoot the messenger. I am cutting and pasting from the book.
Hunting Blinds, Gear, and Equipment
constructs or places a hunting blind, stand, tower, or platform within 50 yards of any designated road, marked unit boundary, or designated campsite;
constructs a permanent blind, stand, tower, or platform
leaves a hunting blind, stand, tower, or platform in place for more than 72 hours or uses metal nails, spikes, screws, or bolts to attach such structures to the timber;
leaves personal gear, equipment (including decoys), or floating conveyances unattended for more than one hour following the close of legal shooting hours.
Note: this does not apply to gear or equipment left within a designated camping area or for specific activities scheduled by the department.
Unattended - Gear, equipment, or floating conveyances not within 200 yards of the person responsible for the gear, equipment or floating conveyances.
And if your friend is baiting at the game camera and not an authorized activity for that APH unit.
baits wildlife (see Definitions) on public hunting lands, except when performed in conjunction with the use of traps or snares for taking furbearers and predatory animals, or as otherwise authorized by the department for a specific unit, activity and time period
Baiting - The placement of minerals, vegetative materials, or other food substances used as an attractant for wildlife.
And if he is on Forest Service or Corps areas, different rules could be more lax or more strict, but I assume we are talking APHP here.