Ok, so we are meeting at 0800 at my house.  Tsunami, i think you can make it back to mystic by when you need to be there.  We would be back here around 2:30.
However, on a trail, things can, and do, go wrong.  Something breaks, a tree is across the trail, etc.  So, if it takes longer than the estimate, that is a risk you will have to take.