Power sent me a pm on this, but thought that I would reply here, as I'm sure you're all interested. The question was whether one could legally strip the truck without worrying about the fuzz. Interesting question, but before I give a short answer, just remember that I'm not your attorney on this, nothing about this post is intended to create an attorney client relationship with any reader, and this is not a formal legal opinion, just some off-the-cuff ramblings of a guy who happens to be an attorney, so take it for what it's worth.
First, I'm impressed that Nevada has a pretty tough law for these types of things. If you dump your vehicle in the desert and don't remove it, they suspend the registration on every vehicle you own until your junker is removed. If it's stolen and then dumped, you don't have to go get it, but only if you reported it stolen before someone reports the dump to the police and you give up title to the state when you do that. I suspect that metro has given the required notices, so the vehicle is legally the property of the state, and arguably metro has a duty to go get it and then sell it for what they can get for it, but it sounds like they have no interest in doing that.
As a result, you likely ok to go get it. I say that not because there's any law on the books that says you have a right to pick up anything you find in the desert and take it home, because that is not the case, but because most people will view a partial removal as better than leaving the whole thing up there. Plus, I expect metro and federal land managers will not complain too much.
However, you should be careful not to spill and oil or other liquids in your removal, as you could be held civilly or criminally liable for any environmental contamination you cause while doing this. Plus, leaving a pool of oil is bad form.