Wee ones!

Now that all my cousins are getting older and none of my siblings have children we really don't have any little ones who will be coming to our wedding. Mr. Smith's older brothers have little kids (1.5, 3, 5 & 8) but since none of them live anywhere near Texas they are talking about leaving them behind with extended family and attending the wedding sans-kids. Is it weird not to have a ring bearer or flower girls at your wedding? I always thought it would be so cute to have them involved but I can't really force them to bring their children. Or can I...?