Put treats in and shut door for a few minutes. Then reopen and tell her she is a good girl. Toss toys in. Keep doing this. I used to start my pups one at a time from the time they were 5 weeks old until I shipped them via air at 9 weeks. The last one I shipped air went from Sacramento to Seattle then via car to Victoria and never had a problem. She also did not piddle until she got out of the car in Victoria. My dogs have all learned to use crates as dog houses with the door removed. Then if you need to put the door on they are well used to the crate feeling. Also an open wire crate may be the answer for an insecure puppy. Gotta get over there and meet her. lol.