Quantum Entanglement : has there really been an unambiguous experimental basis? - troubled non-physicist

I been having bad dreams (a little exaggeration) on trying to contemplate if the arguments stated in EPR paper may have been correct. It is not clear to me whether Bell really did disprove the hidden variables theory.
Is the reality of Quantum Entanglement still an open question?

If we have two entangled particles A and B as an example, has there been any experiment measuring particle A's and freezing that state for a time and measuring B's value anytime later? Most of the experiments I see are continuous streams of photons or particles, split-ted and fed to detectors. But not two isolated systems clearly showing that "spooky action at a distance".