Lots of great advice here, so I’m only going to reiterate what I consider the best:
Microchip, and ask the vet to submit the info RIGHT AWAY. My pup was chipped on Dec. 1, and I just got the “Welcome to the Home Again Family” email today!
Restraint in car. I prefer plastic crates for smaller dogs, but since Loki seems comfortable in the car, definitely a dog harness style seat belt. Even well behaved dogs have bolted from cars and in at least cases I know of personally, things did not end well.
NEVER leave your dog alone in a hotel room, even if it’s crated. In most hotels that’s part of the rules. Always have a crate with you (you can buy the collapsible wire ones, or an easy to de/construct plastic crate). This way, you can leave Loki in the car while you’re eating and know he’s not going to destroy the car.
Don’t bother freezing water. It’s going to be defrosted w/in a day. Just get 5 gallon plastic jugs of a bottled water (national brand). If you need more, you should be able to buy it anywhere. Fortunately, most dogs are not like horses and are not as picky about water.
Buy a 50-75’ length of lightweight line or cord. put a snap on each end. Fasten one end around your waist, and the other to the dog. Now you can safely play ball or frisbee when you stop and Loki can run his yayas out.
Be safe, think ahead, and take lots of pictures you can post for us later!