Last month we did the latest tour at 9:30 am so we could take advantage of rope drop waits. Rope dropped SM and Buzz with an 8:30 am EE, and even with a slightly delayed open for SM made it to the tour easily by 9:30.
Because we started later, we saw the parade preparations right before they left—all the floats were out, all the characters were milling about (even Minnie and Mickey without their heads on!), and we saw them using cherry pickers to put characters on some floats! Utilidors were great but can’t we saw as many princesses as the others. Maybe those were the same CM who we saw on the floats for the parade.
All in all, sounds like any of the times will work out well! Enjoy!!