We do love your kids but we want the celebration to be the night off for you!
If your invitation says "and Guest" or "2 seats reserved for you" then yes, if not, we would prefer if it was just you.
Cocktail or business casual. We're pretty laidback and don't like dressing up much so if those shoes are too high or that top button is too tight, let it all hand loose. The theme is boho rustic if you need any ideas.