What are the bridesmaids expected to wear while wedding dress shopping?  I've never been dress shopping before so I have no idea.  There's also a maids brunch at the bride's home the morning before.  I imagine this is all very casual, but casual to me means different things to different people.
Also, would it be horrible if I have to bring my toddler shopping?  Daddy is working and he's never had a babysitter and everyone that could watch him is in the wedding.  
Thanks!