Beyond the validity of the legal arguments, I wonder about the second-order impacts if this goes through.
For one thing I'd imagine there's a significant amount of private land with negligible monetary value because it lacks transportation infrastructure and the legal rights to construct such infrastructure. If local communities can convince the state to build roads through national parks, refuges, and wilderness areas I'd imagine the private lands around those areas will hugely increase in value. I wonder if this will kick off a land rush and drive more development in these areas.
The downside of course is that the ecological value of these lands would plummet, since many animals that roam or hunt require uninterrupted contiguous areas.