The entire premise is a bit shaky and I am not convinced planned re-locations will result in a net positive for the environment. It's quite possible for a human to live in the wilderness alongside the aforementioned wolves (I saw a pack in the distance as late as yesterday). As you say, this sub-thread isn't about that, though. :)
For what it's worth, large parts of the remote and sparsely populated areas are being slowly de-populated anyway. Things like coal mines and other obsolete resource extraction sites are shutting down, and most people move on over time. And then there's morons like me and my family, who moved out because we want to. There's more people like that, but it's not really enough to worry about.
Long story short: If someone is staying behind when businesses, stores and schools close, and the ageing infrastructure crumbles, well, then you're not going to convince that person to move anyway.