I drove my first rabbit (only had one then) from Florida to Kentucky and back, approximately an 11 hour trip one way. Here’s what I did that may help you.
I left for KY in the August afternoon heat, so I threw a wet towel over her cage until the sun went down in case the AC didn’t do enough to keep her cool.
I put newspaper on the bottom, then bought one of those woven hay mats and threw it on top so she would have hay but sitll plenty of space to spread out.
I bought some of those window shades for babies, to minimize direct sunlight.
I stopped around every 3 or 4 hours to give her a chance to eat pellets/drink. She did fine on the way up, but on the way down she wouldn’t eat or drink anything. Again, this was an 11 hour trip, and I didn’t want her to get dehydrated. As an emergency effort, I bought baby carrots (I know-bad bunny mom), would dip them in water, then let her have a nibble, so she got some water in her.
I found a useful information thing when I was doing my travel research. The file is too big to attach to this post, but PM me and I can send it to you if you want.
Also, this is how I found Asia the morning after we got back to Florida- she was definitely glad to be home!
