The Kobo Aura One actually is way better than the Kindle for this because it has an orange-capable backlight which disturbs you a lot less than the white.
The best sleep I have ever had in a hotel was NH Budapest because they have an extra door inside the room to block any noise or light coming from the corridor. This is something to look into at other hotels, too.
Take a hot shower and do
before going to sleep.
Carry your favorite pillow. It might matter a
lot. I am lucky that Tempur created the travel version of the neckpillow I use normally.