I happened to have sat in Row Q and Row H. I would definitely recommend Row G even if you are short (I am also very short). There is a slight slope in the orch which helps a bit and the seats have nice "windows." Though the last time I saw the show, the usher told me that the cushions are just for kids and there were far less available for use, so that is something to keep in mind. Not sure if this is a new rule or just a particular usher.
As for Row Q. You'll have a perfect view of the whole stage and the mezzanine does not impede the view of the stage at all. Have fun!
So, that was the Drowsy Chaperone. Oh, I love it so much. I know it's not a perfect show...but it does what a musical is supposed to do. It takes you to another world, and it gives you a little tune to carry with you in your head for when you're feeling blue. Ya know?