All our dogs travel in crates, it's for their own protection (think car seat for children). Some of ours don't like to see the world go by in the window so we make sure they cannot see out. Our two youngest (almost 2years) still don't like riding in vehicles. One thing that has worked in the past was short trips to do something they really like; for our dogs that is working sheep. The other thing that works is more experience traveling; over time they get used to it. Until they do you help them deal (thunder shirt, no food before driving, exercise to get them tired, meds if needed, etc). One of my older dogs (9years) still is not fond of loading up before a trip (she's fine once we get started); I find the more trips we make the more willing she is to load up.