S.C.
Well, unfortunately I feel like I am an expert in this area:) I have 3 girls aged 7,6 and 4 and each one of them didi this. I am also expecting a 4th girl, so I am prepared. We do the pick out outfits the night before, but they also know that there are some things that they do not have a choice on. For instance, if I say "It is suppose to be cold out tommorow, they then know form constant discussions :) that they cannot wear short sleeve. I do really like the idea of the bundled clothes tip. So far it has worked with my older two. My youngest is very strong-willed and will sometimes try to change her mind in the morning, and will tell her that her options are still the same as last night, so that if she wants to pick somrthing out form the night before she can. Good Luck!
S.