The granting of statehood did not magically transfer ownership of land acquired and owned by the federal government to the state any more than it transferred the ownership of privately held land to the state. That's the plain language of the matter, and pretending that courts are going to find otherwise now, after more than a century of contrary precedent, is just more evidence of Bundy's level of delusion.
If this doesn’t work, they have a million backup arguments. How about something like King George III was not a legal King and therefore there was no lawful authority for the Treaty of Paris (1783) and therefore there is no lawful basis for the “supposed United States of America.”