Depending on the size of your family it will be specified on your personal invitation. No surprise people or last minute add ons.
Yes; if your child can sit still for a long period of time then bring them we will have a chair for them, if not we will provide child care.
Yes but tips are mandatory on all drinks!
The dress code is semi-formal; meaning if you can wear it to church without any dirty looks you can wear it to the wedding.