Just an FYI - We went to HS at rope drop with same intention early last week and it took us 70 minutes to get through TSM even though the time outside said 30 minutes. We had 5 minutes to get to our 9 am fastpass and thank goodness for the 15 minute grace period. It was so frustrating. This was never an issue before they started generating fastpasses starting at park opening. We got to the park at 8:35 and admittedly there was a crowd in front of us at opening. I would get to the park very early to be in the front of the rope drop. Good luck!