Yeah it was a pain. I brought my apple TV because it was a spare device, and I didn't anticipate the issue. I didn't know Roku had this feature; I'll bring one the next time we travel.
Incidentally, I love our Rokus. A Roku Express would be my choice for a travel-only device. I picked up this 3rd-party remote which also has tv controls (but that may be overkill). https://www.amazon.com/dp/B09J1WR8YZ/