Yes, please specify in on your RSVP if your kids are attending.
There is a 10$ parking charge for all guests at the Grand Plaza Hotel. Feel free to carpool and/or use UBER/LYFT if you are not staying on the property.
If your invitations say "and guest," then yes. If not, we prefer if it was just you.
Beach Formal- dress for the sun+ sand with a nice brunch afterward. Anything you would wear to a nice restaurant on a summer night is appropriate.