Not sure if it's the same in your area, but my daughters (primary) school will usually have once a term some sort of "event" where they invite stallholders. For instance, the Christmas Fayre. They are usually very cheap (think about £10 per table) and might be a way to drum up awareness or even sales on the day?
Perhaps offer a prize draw for a choice of boy/girl (depending on the winners sex!) popular/current outfit, and collect their email addresses and create a mailing list (remember to ask if you can contact them).
Most schools are really friendly, so you could try giving a couple a ring, and see if they have anything you could go to?
I know this won't help your long distance sales but might get you well known locally. Also just thought - how about posters in community halls etc. after all, this is where a lot of the kids parties are held, or even try advertising in the primary times?
Hope that helps