SerScot,
My own opinion of the matter is if the there had been a right of secession it would have been expressly given in the Constitution, rather than left up to the ambiguous Tenth Amendment. The founders in fact were against the idea of disunion
before the revolution, since the colonies could not hope to effect policy in Parliament, or later conduct the war, singularly against Britain.
It was the generation of a
national outlook that enabled the ultimate success of the Revolution and the eventual establishment of the states. Without the success of the nation, there would be no states. Indeed, the actions of individual states during the Revolution (As well as the actions of individual states both Southern and to a lesser extent Northern during the Civil War) were extremely injurious to the overall cause they were espousing.
Any disruption of the union in the aftermath of the Revolution was feared by the founders as leading to a balkanization of the continent, with the potential of individual areas falling prey to the machinations of European powers. This was a secret hope of European powers as late as the Civil War. Current theory on the right of secession, worked up as most proponents are over the expanded role of the federal government today, conveniently ignore that fact.
Yet, the Constitution of 1787 is itself a reaction to the weakness of the national government as represented by the Articles of Confederation, a much more state power centered organization. Not all of the states in 1787 were concerned about the power of the federal government over their affairs. The small states were concerned not by the federal government, but by the larger states. Hence the Senate in the Constitution. The procedure of secession was not listed in the body of the Constitution for the simple reason that there is none. Neither there, or implied in the Tenth Amendment. We shall all hang together or else we shall all hang separately.