Back to Basics:
Your gates are in the wrong place. There is a 'vehicle staging area' in your driveway now. Put another set, up by the road so they would have to park there in order to get into the driveway. That would mean they could be seen while they try to break thru gate set #1. You might want to by an old junk car and park it in front of the front gates to block the path for vehicles. It says there may be someone there, too. Don't leave lights on at night, all it does is advertise that there is something there.
Get some 12v alarms. My Miltronic alarms run off of car batteries. The sensors are 9v. I even have an announcer in my golf cart that receives the signal, rings an alarm bell and sets off the revolving flashing light for 4 seconds. When some one comes via multiple sensors, even the dogs know that somethings coming up the drive. No mater where I am on the property, if the golf cart tones out, I have company. The revolving light is from an old state police car. The neighbors sure think the cops are at my place an awful lot. Its especially effective at night.
I bought a 4 camera Q-See camera + recorder from Costco. Its REALLY cool. The outside cameras are mounted below birdhouses. I upgraded one of the cameras from eBay to a high def unit with 100' night vision. You can buy longer camera+power cables from eBay. The siamese RG59 cables can be run up to 800', 1800' with CAT6 as I recall. My longest run is 450'. I also ran a video cable from the DVR to one of my HDTV's so I can jump to AV1 and see who's at the gate almost immediately if there is unexpected activity. It also allows you to see the camera outputs from another location if you can get an internet connection via phone or other computer. It will also do the email notice.
I have found that doing your own walk around on a moonlit night or rainy day is a good exercise: how would you steal from your own property? That means what's outside that can be used to break in, what is there to steal, are the windows and doors locked, how quiet can I be, and what sense do I get that there is some danger there for me. Nothing like a 'good' dog, either a real one or the sound of one.
It also don't hurt to fire off the old 870 once in a while at random times day or night. That's free advertising. If its one of your neighbors, they may not want to get involved at your place. You know, it can be hard on the ears.
The latest scoundrel I had the fortune with this setup was a ploy by a girl claiming to be a meter reader. Except: no car sign and no badge from AccuRead. I was way out on the property by the pond. She got the shirt from Salvation Army. Pulled up, knocked on door in front and in back (as seen on Reality TV!), dogs barked (that didn't stop her), golf cart turret light takes off, I drive up to her car and wait. I blew her car horn and she comes running. Waited until she gave up the name of her 'remarketter', took her drivers license and sent her on her way. I told her if I ever had another problem I would turn her in. Mailed her licence back after 3 days (as promised). The word has probably gotten out. Traffic up front is sure down these days...
If you do get a picture or video of the culprits and it has a licence plate you can read, there are plenty of ways to turn that into an address. Given an address, 1 gal of Sunoco 260 and a flare pistol, you can fulfill your dream that revenge is its own sweet reward.