If regular traveling has taught me anything, it’s that you can never depend on circumstance. You can only depend on yourself. And if there’s one writing skill that’s overlooked, then it’s the ability to just write as and when you choose, regardless of where you are, the time of day, or how comfortable you feel (and I mean that in a physical and symbolic sense).
Doctorow states in his own words:
“I learned to write crammed into coach seats with my laptop keyboard practically vertical, my wrists bent back at an agonizing angle. Between flights, I’d write crouched on the floor under the water fountain between the toilets in the departure lounge, nailing the only outlet and plugging in my travel power strip to share with others. […] I have written so much in so many places that the desk and the comfy chair and the big monitor are largely aspirational for me — the kind of place I’d like to be writing in, but rarely the place where I end up writing.”
TL;DR? Write how and where you want to write. And if you can’t, write anyway.