It's just as well to know if you have visitors coming, of whatever persuasion. The fewer the routes of ingress to your place there are, the easier and cheaper it is to do.
In my case, there's the jeep trail which goes down to the old forest service road, which eventually leads out to a one lane paved road. That's how individuals approaching my place would probably come. It's unlikely they would try to come up the mountain side, or down the mountains through the national forest, in winter. It would be virtually impossible in summer when the undergrowth is thick and tough to get through.
In order to have a little warning if unexpected visitors arrive, there are some things you can do.
1. Motion detectors. They come in all shapes and sizes. My experience has been that motion detectors you get at big box stores are not going to hold up for long under extreme weather conditions. You can, however, order these devices that are purpose built for exposure to the weather. If you go that route, you need a receiver unit that will let you monitor at least 4 sending units, both by audio alarm and flashing light on the receiver unit. You need a range of transmission based on your own specific case, and the sending units need to be battery powered.
|Dakota Alert 2500 Dcma|
The Dakota Alert 2500 Dcma would be a good set to look at in terms of price and capability. Like anything else, there are cheaper units and more expensive units. Sportsman's Guide sells a good basic unit, with one receiver and one sending unit, for $75.00. You can buy up to three more sending units to interact with your receiver. It's really a matter of determining what you can afford, and what you need.
|Sportsman's Guide. 1 Sending Unit, 1 Receiver. $79.00|
You can get three more sending units to work with it.
If you have a lot of money to spend, you can buy surplus military equipment that will do the job. As always, you get what you pay for.
There used to be "flash bangs" you could set out. These were units with a trip wire, that fired a small black powder charged cartridge when someone or something hit the wire. The noise was certain to wake you up, because it sounded like a 12 gauge being fired. I had problems with these, though. After they had been out in the weather for awhile, the cartridges sometimes failed to fire. If you can afford to replace the cartridges every month of so, it's a good piece of gear.
You can use trip wires with light sticks, but since there's no sound, they aren't worth a lot unless you happen to be sitting out on the porch at night and see them go off. There are trip wire units with flares, but for obvious reasons they are not a good idea in a forest, especially during a dry summer.
If you have dogs, you can string wires across an area you are concerned about, and hook cans with marbles in the wire. Everybody has seen the old WW2 movies where the soldiers do this. I use copper bells, myself. Something hitting those causes a racket, which gets the dogs going, and that clues you into the fact that it's time to get up with the flood light and a shotgun. If you put these across a route you use, you have to be willing to unhook them, drive through, then hook them up behind you.
I use a security camera system with infrared lights. Works good, wasn't cheap. I like to be able to look around outside, day or night, and see what's going on. There are so many of these systems out there to choose from that it's impossible to do much more than say choose one with the features you need in your particular situation.
I use a night vision device, so my security lights at night are all red. This does not blind the system and it helps you see into dark nooks and crannies without turning on the infrared floodlight on the night vision unit. Someone with a night vision unit can see the beam from the infrared floodlight on another night vision unit like a search light shining out on a dark night. I prefer a passive and less detectable setting.
Not so much for intruders, but for fire, I have monitors in each building, which transmit a constant sound signal to a receiver in the house. If the fire alarms go off out there, I know I have a fire and can get out with an extinguisher ASAP. Without that, the first inkling I'd have that one of my buildings was burning would be the sounds the wood gave off as it crackled and popped.
All of these things help me remain in control of the situation here on the mountain, and let me act when necessary, as opposed to having to react to a situation already way beyond my comfort levels. The more money you can spend, the more sophisticated your overall security system can be. However, my much quoted Russian proverb still applies. "The best is the enemy of good enough."