I don't have an answer to where the Schindlerjuden went to after Schindler fled, but I can try to shed some light on Schindler's rational. The worry was not being captured per se, but rather it was being captured by the Soviets specifically. Oskar Schindler, under the rules of the laws of war, was a war criminal. He was a war profiteer (by providing the Nazis with enamelware,) and he used slave labor (the Jews were not being paid, Schindler was paying the government to use slave labor). Obviously he has been largely vindicated for his actions in the eyes of history, but it would be a bit harder to prove that to a Soviet officer. So rather than face a potential summary execution, or being imprisoned in rather inhumane conditions, Schindler, as people far worse than he also did, decided to surrender instead to either the Americans or the British. Wernher von Braun (a key figure in the development of the American space program), for example, also made a similar decision as Oskar Schindler, and fled the Soviets so that he could surrender to the Americans. Over the course of the war, the British and Americans treated their POWs far better than the Soviets, and he likely hoped that he would more easily prove his case. For a very good book about Schindler, which goes to some length to deepen the picture of him and clarify some of the mythology about his life (created in no small part from the film, check out David Crowe's biography: http://www.worldcat.org/title/oskar-schindler-the-untold-account-of-his-life-wartime-activities-and-the-true-story-behind-the-list/oclc/55679121)