Msep and wishes from CG

We are trying to plan in seeing MSEP without too many late nights for our boys. If we have early evening dinner at CG and walk into MK to watch MSEP from town square at 9pm will we have time to walk back along to CG to watch Wishes from the terrace for 10pm?
Not sure how early we would have to be back up at CG for a good view or how long it will take to leave MK after the parade and get back up to CG level.

Hang out near the flagpole or train station, you will have to arrive early for a spot, but once the parade goes by, you can leave quickly and it is 10-15 min to cr