I don't believe that there is any security other than local cops passing by and the such.
The entire place is surrounded by a fence topped with barbed wire. As strange as it seems, the canoe was our best option. There are houses pretty close to the fence too. Close enough that we could hear them talking on their deck. You can see little glimpses of the houses from behind the main building, which means that they can also most likely see you.
I wouldn't suggest going either. This place is sketchy. In the places that it hasn't collapsed, the floorboards are buckling like nothing I've ever seen.
The building is easily seen from the road.
See here. Luckily, the intact part of the building is in the back, away from the windows.