A long while ago, our dear Hooch posted a Travel Emergency Form that I think is essential to have in the vehicle with you and the pups all the time.
I have one in each car with home info and one I write up for long distance trips. I laminate it and have it pinned to the back of my seat in the car, one in the glove box too

.
I also have little time capsules (for lack of a better word) that attach to the girls collars that unscrew, and inside you can write your vacation address, phone, campsite #, medical needs, etc on and put inside. Got them at Petco.
I can't seem to attach the file

so I just copied it here.
Thanks Hooch....still watching over us as always....miss you.
TRAVEL EMERGENCY INFORMATION SHEET
(Everyone who travels with their pets should carry one of these sheets in the glove compartment of the vehicle, one in their wallet or purse and one attached to one of the crates that has been laminated and is visible to anyone who would have to go into your car/van incase you were in a wreck or other emergency)
ATTENTION – IN CASE OF EMERGENCY!!!!!
Owners Name: __________________________________________________ _____________________
Address: __________________________________________________ _____________________
Phone: _____________________________________
Pet's Name: __________________________________________________ _________________
Breed: __________________________ Sex: ___________________ Date of Birth:________________
Medical Information:
(This animal is current on all shots - it is of no threat to anyone he/she might come into contact with) the attending veterinarian is: Name:____________________________ Phone #___________________.
(If dog is not wearing a collar when in their crates, this animal's leash is located: ____________________________ and you will be in no danger should you open the crate and attach the lead.) This pet has the following medical conditions that must be treated or other things you must know: __________________________________________________ _______________________________
__________________________________________________ _______________________________
__________________________________________________ _______________________________
This pet's regular veterinarian is:
Name:________________________________________
Address: __________________________________________________ ________________________
Phone: _________________________________
SHOULD I BE UNABLE TO ATTEND TO MY ANIMAL DUE TO INJURY OR DEATH:
Contact Name: _________________________________
Address: __________________________________________________ _________________________
Phone: ________________________________
Animal should be boarded in the nearest animal boarding facility or veterinarian. PLEASE DO NOT TAKE my pet to an Animal Shelter or Humane Society. The above person has agreed to pay all fees to retrieve said animal and they have my permission to remove said animal from the boarding facility. Said person also agrees to pay any medical bills for said animal. Should my first emergency contact be unavailable, please contact:
Name: _________________________________________________
Address: _________________________________________________
Phone: __________________________________
Said individual has also agreed to the above.
Should one of my animals be on the loose following a car/van/truck accident - please contact the above individual who will assist in the search should I be unable to participate. Your cooperation in this matter is greatly appreciated. This animal is a member of my family and it is my wish that it receives the best care possible.
Signature:___________________________________
Date: _____________________________