1. the fences to see where people have been cutting them or splicing them to allow for easier access.
2. All the trees within eyesight of your proposed Pirate Loot site for camo'd trail cameras. Install some of your own to ensure no one is a frequent flier in your turf. Ginseng poachers are a problem in wooded lands in the Eastern part of the US. With legal weed (in many states), growing pot on someone else's land has died down a lot (the owner of the land ends up in legal trouble).
In the end, it might be easier to dig up part of your basement to bury it there. And to obtain a large gun safe to appear to be where valuables are stored. If someone wonders why the cement floor has cut/repair marks, just shudder and mumble plumbing work on the main drain line due to tree roots.
If someone has a history of taking a lot of solo camping trips it might not raise suspicions.
A common way criminals get caught is by suddenly doing something out of the ordinary. If the 50 year old guy who sits behind a desk and spends weekends at home with his family suddenly takes up a hobby of camping alone in one specific remote location and his trips coincide with each a acquisition of gold bars, the investigators monitoring him are going to be all over that.
I think everyone in this sub thread is imagining that he got all of the gold bars at once and could have made a single move to hide them all. He gathered these over many requests. Taking a solo camping trip every time you acquire something new is red flags all over the place.
In all likelihood, his taking more than forty million dollars wasn't the suspicious behaviour that set him to being investigated. It's right there in the charge sheet. He was being investigated because payroll noticed he was fraudulently claiming leave that he wasn't entitled to. There's no routine oversight on who they're bribing with actual gold. There's still routine oversight on their payroll and HR practices. That led to them actually checking his resume properly, and when that was shown to be bullshit, only then did they actually look at what this guy was doing.