We moved from near San Antonio to central Kentucky about two years ago, and I had two macaws, a GW and a RFM. I had a big travel cage for the GW- she went to work with us on a regular basis- but the RFM was suspicious of travel, as it usually resulted in a nasty trip to the vet. I spoke with our vet, and I purchased the biggest cage I could fit in the backseat of my 4 door pickup. I loaded them up- and told them ( the birds) what we were doing- and settled in for the haul. We stopped in Arkansas at a hotel for a quick chance to sleep- it was "pet friendly" - I just didn't say what kind of pet- hauled everybody up into the room, put lots of newspapers under/around the cages, broke open food, water, grapes---they perched on the sides of the cages- I took enough of a nap that I was safe to drive in the rest of the way. I kept H20, fruit and kibble available in their travel cages, even if it made a mess. It was stressful but they weathered the trip ok. As soon as we arrived, I had help to set up their cages and got them settled in. In a day they were acting like themselves. My RFM screamed from Blanco to Arkansas.
We considered renting a travel trailer, but just gutted it up and drove them.