DD attends a school near WDW and left her beloved ukulele at home. I'm flying down to see her soon and will be bringing her ukulele to her. What a is a safe way to bring it on the plane? My luggage is not hard-sided, so I'm afraid to check it. If I put it in my carry on bag, it might get damaged when the overhead compartment is closed. It's probably too long to fit under the seat. Any suggestions?