My Dovo came with a travel case. I have taken my TM Vegan Strop. Last time I had trouble using it because the bathroom door would not stay closed. I had to keep one foot on the door because the door knob was busted. I also had a 8K slipstone which I did not need.
Next time I will take a pasted travel strop, and not bother with the slipstone.
For flying I have a double bladed cartridge razor, or a feather portable DE, or a gillette travel de.