Yes, when RSVP'ing please list names and ages. With a playground and lake so close to the venue, it is very important that any little blessings you bring with you are adequately supervised at all times.
We want you to feel comfortable, so if those shoes are too high or that top button is too tight, let it all hang loose.
If your invitation says “and Guest,” then yes, if not, we would prefer if it was just you.