Virgin Galactic founder Richard Branson said he was looking forward to celebrating the flight with his friends and family when they land.
Lead Operations Engineer Colin Bennett said he was excited about experiencing high G-forces and Chief Astronaut Instructor Beth Moses assured followers the climate control would keep the crew "perfectly comfortable."
Meanwhile, Vice President of Government Affairs and Research Operations, Sirisha Bandla, said she has been so excited that she has been dreaming vividly every night.
The launch of Virgin Galactic Holdings Inc's VSS Unity rocket plane over the desert will mark the space tourism company's fourth crewed test mission beyond Earth's atmosphere. But it will be the first to carry a full complement of space travelers, consisting of Branson, two pilots and three mission specialists.
The flight is scheduled to take off on July 11.