I think that you should keep a couple of small things and then pass the rest on to a friend or family member to use.
I kept more than I meant to and then passed it on a few years later when my brother was having a baby. It was easier to get it out of the house then than it was when they were tiny.

BTW - I do think it's great that you keep old clothes. I've been reading To Die For in last week and the way that clothing has become disposable is kind of scary.