Hello, I know what you mean about bunnies getting scared in car rides. This seems like a pretty tricky situation, but in my opinion I would keep your buns at home. The stress and multiple changes and new environments could be really bad on them, and could change their eating habits which leads into a lot. When my bun is scared and stressed he won’t eat. Also the whole airport checkout, and the air pressure of them being in the air will spook them. If you do have no choice than to bring them because you can’t find a sitter, I recommend bringing their cages (if they use them) and keep them the exact same so they have their own safe spots. Have your bunnies been bonded for awhile? Sometimes when they’re really stressed they get aggressive and a fight could break out on the plane. I hope I helped a little!