Nor can the sheriff order them out. This is just inter net garbage. If in the blogs you link to say otherwise please show me.
OK, here are the first five paragraphs from the first link...
Guess what? The District Court ruled in favor of the sheriffs. In fact, they stated, Wyoming is a sovereign state and the duly elected sheriff of a county is the highest law enforcement official within a county and has law enforcement powers exceeding that of any other state or federal official. Go back and re-read this quote.The court confirms and asserts that the duly elected sheriff of a county is the highest law enforcement official within a county and has law enforcement powers EXCEEDING that of any other state OR federal official. And you thought the 10th Amendment was dead and buried not in Wyoming, not yet.
Bighorn County Sheriff Dave Mattis spoke at a press conference following a recent U.S. District Court decision
(Case No. 2:96-cv-099-J (2006)) and announced that all federal officials are forbidden to enter his county without his prior approval
If a sheriff doesnt want the Feds in his county he has the constitutional right and power to keep them out, or ask them to leave, or retain them in custody.
The County Sheriff in most western states trumps everybody. POTUS, governors, legislators, judges - everybody.
It's just been so long since most of them exercised the power, they don't know they have it. Arpaio knows. Bernalillo County, NM former Sheriff Darren White knew. A few others will wake up to the fact, hopefully before it is too late.