If the Primo's trail camera is an IR then I would put it up about 7 to 10 feet off the ground and aim it downward to pick up any movement and lock it with a good sturdy cable.I use the coated bicycle cables that coil back into a smaller shape like a slinky and use a good strong lock.
Where are You setting the trail camera up...on a trail,a gate or by a feeder,salt or mineral lick?If its too obvious would-be Theifs will be looking around for a camera so hide it good and out of reach if possible?You may be better off to set up a cheap camera close to ground level then put Your better more expensive camera up high?They also make different brands of trail camera's that send a picture to Your cell phone,via-internet or to the brand of trail camera's web site so even if the camera gets stolen You still have a picture of the Theifs!
www.MoultrieFeeders.com
www.dlccovert.com
www.buckeyecam.com
www.smartscouter.com
You can also check out several trail camera reviews at
www.chasingame.com