I think it sounds like a great trip
. Sorry, I don't have any tips, but I think if she has to go, she will let you know. Everytime you stop, assume she has to go too. Leash her up and take a little walk. Zhoie is easy, when it comes to the car and potty, but she hates riding in the car...errr . I have said pee pee before we get into the car, from the time she was small, she's a pee pee on comand
So when we stop she knows the drill
I agree, take things she is familar with, she will be much more cozy.
Have a wonderful time with your family.
