No. There will be no children under the age of 18, unless specifically okay 'ed prior with the bride and groom.
No, unless your invite says & Guest then you are not entitled to bring someone.
Yes, there will be transportation to and from the venue. It will pick up the guest from the hotel and drop them back off at the hotel.
Per the venue rules and the safety of the guest, there will be NO touching or riding the horses.
Yes, outside only in the designated smoking section.