Bring plenty of food and treats, bowls, your dog's leash and collar, and a bed or crate. Pack a copy of your pet's vet records, including his rabies certificate. Burkert suggests that owners consider bringing other gear like drinking water.
"If your pet's stomach is easily upset, it pays to take drinking water from home with you."
Stash these additional items in a tote to round out your pet's gear: paper towels, an old towel, toys, plastic bags to pick up after him along the way, a first aid kit, pet insect repellent, and sunscreen.