I’m willing to give a little more space to mothers at the kosel than at shul on a regular shabbos. They need to go.
Besides, I think it is important for the kids to come also. Even if they won’t daven much. (And didn’t I once advocate for letting your kids run around in shul? http://www.theyeshivaworld.com/coffeeroom/topic/why-im-going-to-let-my-kids-run-around-in-shul)