If your invitation says "and Guest," then yes, if not then we would prefer if it was just you.
We love your kids - we really do! But we want our wedding to be your night off! Other than the little people you'll see walking down the aisle with our rings and flowers, we would prefer a child free night to celebrate.
Semi-formal, please. But we want you to feel comfortable, so if those shoes are too high or that top button is too tight, let it all hang loose.