To travel on the plane, instead of the Bob dry bag, I purchased a large, inexpensive hockey equipment bag and put lock, stock and barrel into it — that way, there was NO chance of another baggage charge on the plane, as it was not another “wheeled vehicle” — worked like a charm — open the bag, take out the trailer, replace the wheel, and put belongings back into bag — only have to deal with it when you are packing it up for a flight. And it tracked perfectly up and down all the hills…