Hi there - I am new to the site as well.
I moved from the southwest to the northeast with my husband & 2 cats. Because of them, we chose to drive. I was too wary of sending them on a plane. Although there appear to be some good animal transport services out there - they are also $$.
The drive was definitely an experience as neither cat was used to riding very far. We started out with each in a soft carrier buckled into the rear seats. By the end of the trip both cats were allowed to roam free. Their sanity, as well as ours, proved to be of greater importance than the secure safety of a buckled carrier. Both cats began to moan and rub fiercely against the carrier after the first day (which was relatively quiet), which is why we let them loose... I have many more travels details if nay of this pertains to your question. Hope this was helpful!