My biggest concern for those of you who have dogs riding loose in the car is their safety! I don't happen to crate my poodles in the car, but they do wear sleepypod harnesses and are restrained safely. My main reason for not crating in the car is that Lily always got car sick in a crate in the way back. I think she was uncomfortable with riding over the axle.
Peggy is wonderful in her crate at night, but we've never used one for transport. She does tend to pace in the backseat, never wanting to miss out on what's happening outside the windows. Should we be crating her in the car, too? If so, is soft-sided best?