“And where the bargain was not to their liking - the prohibition on slave imports, to cite and example - Southerners openly repudiated and violated the agreement as well.”
That is an interesting comment. May we see your data?
Well, you have the which arrived in 1859. You have the Wanderer in 1858 and no doubt many more. Southerners were importing slaves from outside the U.S. long after Congress outlawed it, and the Confederate Constitution guaranteed imports. So anyone who thinks that it wouldn't have continued in a Confederate state is just fooling themselves.