There isn't one...you've most likely been to a wedding before. There will be a wedding dress and suits involved but no tuxedos and ball gowns. You decide based on your comfort level.
We love our kids and they are a big part of our day so we would never expect yours to stay home. The more the merrier. Family is everything!
Your invite most likely includes a guest so the answer is yes. No you can't bring the friend you met last night, no matter how cool they seem, this is our wedding not a movie.
That sounds fancy. "Venue", it's our home, but yes we plan to have a shuttle for everyone from their hotel or at least from a designated parking area. More details to come.