To my knowledge, the State of Nevada has not designated the land in dispute as Open range. Therefore, your point is moot.
Your argument was used by another welfare rancher preceding Bundy, and rejected by the Federal court in that case, in the link that I provided:
"Absent consent or cession a State undoubtedly retains jurisdiction over federal lands within its territory, but Congress equally surely retains the power to enact legislation respecting those lands pursuant to the Property Clause. [citations omitted] And when Congress so acts, the federal legislation necessarily overrides conflicting state laws under the Supremacy Clause."
http://caselaw.findlaw.com/us-9th-circuit/1061959.html
Also interesting in that case was the following footnote:
"An Amicus Brief was filed on behalf of the states of New Mexico, Alaska, Maine, Montana, Oregon, Vermont, and, significantly,
Nevada supporting the position of the United States in this case."
So not even the State of Nevada has supported this other welfare rancher preceding Bundy.