I'll only go the the shops that have the bigger change rooms to take the pram in, Target do, whereas K-Mart and Big W don't, although Myer do.

I don't get clothes from anywhere else so not sure what the change rooms are like in those little clothes shops.

Another option, if you know your size, is buy some stuff online.

Prada - don't worry about what you said, I have seen plenty of mothers do the same and don't feel you have to justify yourself.