If you live within the US and don't actively defy the standing government, I say you are de facto subject to them, whether you like it or not.

The "consent of the governed" is an extremely ephemeral concept anyway. Consent of which governed? All governed of any age (including minors) at all times? How is a "government" supposed to effectively govern only an arbitrary subset of the people living within its claimed jurisdiction? Can neighbors belong to different countries? Furthermore, can the consent of any individual be given and revoked at any time for any reason? If I get pulled over for speeding can I just secede on the spot and inform the officer that, as a result of my recent secession, he no longer has any "just powers" over me? If any individual can revoke their consent to be governed at any time for any reason, then I don't think there's really going to be a whole lot of governing going on.

Of course, if we then get suddenly invaded by our hostile neighbors to the north, can we all conveniently redeclare our allegiance in order to benefit from the standing government's duty to defend us?

None of this sounds even remotely workable. Reality is that the government owns us and our property more or less because it can, and failing to flee whatever jurisdiction it claims authority over is implicit consent to be governed by it, because that's just what happens to anyone who sticks around, whether they "consent" to it or not.