Here is Wisconsin, trespassing is not a hunting violation but a criminal act. Wardens do not come to a trespass call, the local (generally Countie Mounties) LEOs respond.....and they take trespassing very seriously. They are happy to use photos of backtags, license plates, 4 wheeler registration numbers or photos where the identity can be seen. Photos showing the individuals on your property are evidence. Last year with the couple trespassing and picking morels, the husbands got snarky when I told them to leave the morels they were trying to steal. He claimed I could not prove they were taken from our property. I told him the photo on my cell phone showing them with full ice cream buckets on my property would be hard to deny. I told them they could either empty the buckets and go back to their car and leave or they could wait for the cops to show up and talk about the trespassing and theft charges. Again, they were on my property without permission, in attempt to steal something of mine and the husband still called me a f%&#ing jerk as they walked away. This is the mindset of most trespassers. They somehow feel entitled to use land they did not pay for, do not take care of, nor do they pay taxes on, just because of who they are. Many times, if folks would just stop and ask first, but no, it's better to trespass than to risk the chance of being told no. For some, being told no means they now have to trespass. Like the morel hunters. I watched them drive by slowly twice and saw their brakelights as they parked around the corner, thinking they were out of view from the cabin. The little cover in the woods made it easy to pick out the white ice creme pails they carried....stupid is what stupid does. If I see folks on the property I do not recognize, I always go to see who it is. I generally have my GWP with me, a 1911 in a shoulder holster and a cell phone. Sometimes it's someone lost, a utility worker or someone that does have permission to be there.
I have had trail cams trashed, No Trespassing signs torn down, fences cut and gates left open from trespassers. I have had my opening day of Turkey or deer season interrupted because someone didn't see me in the woods and figured it was open to them, even without permission. The only real deterrent is having someone there or making folks think someone may be there. During the general gun deer seasons, my sons or I leave a vehicle parked at the cabin on our land during the week on days when we aren't there hunting....otherwise some of the neighbors and others feel they are safe to go.