+1 on the OP-1 (or some POs). I travel all the time with my OP-1 and it’s perfect for long transatlantic flights or early jetlag-induced playing in hotel rooms. Battery lasts forever, and fellow passengers or cabin crew always ask me what it is!
Not sure if you’re flying but putting a DT or DN in your hand luggage would probably raise eyebrows at security, and will add weight to your checked bag.
Have fun!