Take the pet to the vet . There are a few reasons to do this. This is important for your dog's health as well as the health of others. If your dog will be around other dogs, Bordatella vaccine is important. Check with your veterinarian.
Many local ordinances require proof of current vaccination to be on the dog's collar.
If your pet has never been in a car, take him on short trips as conditioning for the journey. Remember that traveling can be very stressful for a pet. Properly restrain your pet, for the safety of everyone involved. If you use a crate, attach bowls for food and water. It is also a good idea to get your pet accustomed to the crate before the trip.