We put our cat's carrier in the living room for a day or so before traveling. Let her go in and out and sleep there if she wants. Then when traveling, set it on the floor with the door propped open. If you have room, leave it in the MH all the time. It'll be her "familiar" place. Litacat gave the same advice I'd give, too. We travel with our 2 cats all the time...but we did start when they were kittens.