These events will be formal / black-tie-optional dress. Both the ceremony and reception will be held indoors, but it will still be October in New England, so dress warmly if you can! Here's a really helpful website that explains the dress code further: https://www.theknot.com/content/formal-wedding-attire
Ours will be a Catholic ceremony, but we will not have the standard nuptial eucharist (ie. the bread and wine). In general, as a guest, normal wedding ceremony rules apply. There is some sitting, kneeling, and standing involved in the service; when in doubt, follow what the priest Father Ed or other Catholic guests do. Please know that you don't have to recite, sing, or read aloud anything you don't want to or aren't comfortable with.
Absolutely! Note, though, that the ceremony will be held in a sacred space, so the silence might feel a little heavier than a normal quiet room. But even if they make some noise or walk around during the service, as long as they aren't unnecessarily disruptive of the priest during the ceremony, we would love to share our day with them.