Earlier the better for the shows as well. We lined up about 20 minutes prior to the first Tangled show, and our DD was able to get a front row spot on the floor seating and we were able to get a front row seat on the bench.
When the show is over a line forms to the right of the stage to meet the characters.
For the princesses early works well too, but we also went over during the afternoon parade and there was no line.