+1 baldysquirt’s comment.
Did a fair few miles on a Kona Lava Dome a while back. Used flats with bar ends. Found having 26inch wheels very handy for picking up spare tubes, tyres, wheels etc. Would also recommend a square taper BB for ease of repairing BB and/or cranks in far-flung location.
One of my favourite touring memories was of my mate breaking a crak and us getting a spare one from a local bike shop in the back of beyond. The only problem being it was diamond as opposed to square if you get my drift and so he had to cycle 200km with cranks at 3 o’clock! Very funny…