Not if they came armed.
If Congress ordered all units under their authority confined to barracks without arms, those who brought their own would have to comply.
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The point is, Congress has command authority over these bodies, not States.
It is certainly true for State Militias, under I.8.15 & I.8.16., and we have already agreed that it is true for the NG. If I'm not mistaken, the State Defense Force is a creation of Congress, with authority delegated to the States.
That leaves a State without an organized force to resist a tyrannical federal government. The only body that even comes close, and is not under the authority of Congress, is the state police.
The notions that the Second Amendment was "meant to keep Congress from interfering with state militias" (Chemerinsky), or "designed to allow states to defend themselves against a possible tyrannical national government" (Bork) are obvious falsehoods. Do you agree?