I wouldn’t worry about doing that unless you’re checking the harp as baggage and/or travelling quite a great distance. That’s usually done when people have to ship harps, or when the climate is going to change or differ drastically between origin and destination
I have travelled by train with my Christina, which is around the same size, between Quebec City and Montreal. I didn’t check it and would definitely advise you not check yours unless it is unavoidable. It’s always better that you handle your own harp. Trains are usually good on room. I take mine on subways and buses, too.
Just be mindful and cautious of yourself and others. Sometimes folks are lost in their thoughts and swinging bags around. The side with the levers is more delicate than the side with the pins, so keep the lever side towards you.
And, if you like, either have a few pieces ready or some sheet music to play – small harps in particular really delight people, and someone is bound to ask you to play! You may enjoy benefits such as tips, drinks, snacks, memorabilia or a free ride in the vibrating massage chair 