No, not unless your invitation says "and guest." We wish this special day could be shared with everyone but, unfortunately, the Fire Marshall would shut us down and then Sarah would cry. Don't be the one who makes the Bride cry. She has 4 brothers and they'd have to "chat" with you about it.
Texas Formal, please. The boys wear suits, the girls wear dresses. Boots and hats are acceptable because this is Texas y'all.
YES! They'll have their own meals and entertainment so, unless they're teeny tiny, they will not be sitting at your table. Please keep that in mind because you are still responsible for your children.
Please contact the Bride's Mother or the Groom's Mother. They're all-knowing and will be happy to help you.