I understand and we're on the same page on that part. The BLM administratively agreed to enforce state laws on BLM land, because there hasn't really been a reason not to. Some of the other federal agencies also did so.
Where we disagree is where you said state law controls on BLM property. It doesn't. Federal law "controls", state law is also allowed to be enforced. That's an important distinction.
I'm also saying as someone that has directly dealt with the BLM in multiple states, that this is done as a courtesy and has little practical effect. The state has zero role in our permitting process. They are federal permits agreeing to follow federal laws on federal land. The specimens are all curated in federally regulated repositories. The federal government laws "control". The state has nothing to do with it and has no say in the process.
The extended courtesy means if one of the crew broke a state law, the state could also charge them, but the feds are very much in charge of who does what and when on their land.
Further, this courtesy of also extending state laws to BLM lands could be modified, or rescinded with a meeting, or executive order from Biden.