I guess Hoover should get some credit for telling someone outside the A circle, and pretty much "on the other side." Even if his motivation was crappy, and I don't know for sure that it was, he couldn't have expected LP wouldn't tell something this important. I also give him some points because his lawyer seems to have given him some good advice and he seems to have followed it. He gave what he has left to LE and I hope they can confirm it.
Hypothetically, I wonder what the intention was to locate the body in November. I guess it depends on whose behalf they were acting. Was it to make sure the remains were still there, to offer up and do a deal with LE, or was someone else trying to force a deal with LE, or just to see how likely it was that anything was left that could ever get discovered, or to tamper with evidence in some way. If I was working for anyone in the family, before or during the time I did such a thing, I wouldn't want to be in a position to have to explain to LE why I was out there multiple times in the area where the body was ultimately found.