If I have a container page that shows all children galleries, can I hide the Manage Pictures button since I manage the photos for each child on its respective pages?
yes, either do a custom galleryOuterTpl for your childgalleries page that does not have maxigallery.managebutton placeholder or add &manageButtonTpl=`@CODE:` to your snippet call. The later will simply define empty tpl to the manage button template so nothing will be visible.
"He can have a lollipop any time he wants to. That's what it means to be a programmer."
Thanks, that was exactly what I was looking for!