The problem with paints that resemble black body surfaces (like vantablack) is that, although the laser is absorbed, the surface will be, on average, warmer than the surroundings and still emit infrared radiation. So, what lidar misses, thermal imaging will pick up. Furthermore, if you do create something that absorbs laser energy, to the lidar plot, it will look like a huge hole in the ground and will stand out far more than if you did nothing at all (remember, you are on the ground, not in the air with nothing behind you!). If it was that simple to hide from military technology, well....
What I would recommend is to bury your fortress underground and slightly apart from the main property, but piping the ventilation into a decoy that is expected to give off heat, such as a run down trailer house with kids toys strewn about the uncut lawn. If you really want to get serious, have a decoy church the entire community is involved with. And when you hear a plane coming, don't run for cover, hold your arms out and rock side to side as if you want to get the pilot to tip his wings and acknowledge you.
When local police possess handheld radar devices that can look through walls and pinpoint the motion and pattern of a person's heartbeat as a means to spatially locate said person barricaded in a home, a friendly wave will be far more effective than any attempt at hiding.