FYI - you don't need to buy an expensive machine to generate white noise, if that is all you want.
Most hotel rooms now have clock radios - you can turn on the radio part of the clock, and tune it to either the very top or the very bottom of the dial, or where ever there is no actual radio station.
Voila! Free white noise in any hotel room!
Many (but not all) clock radios allow you to set the alarm separate from the radio, so you should still be able to use the alarm clock.
Personally, I take ear plugs and sleep with them whenever we travel - I"m a VERY light sleeper, and usually won't get much if any sleep if I don't use the ear plugs.