You should have time, you probably will want to get in the park entrance line 15-30 minutes before the official opening time. The parade will come right by the D-Me ride, so you will be able to watch it from there. If they start at 10, it will take "several" minutes for them to get to you, perhaps as many as 20 or so minutes, depending on where they are in the parade.
What day are they marching?