Best not to walk more than 4 Amos (6-8 feet). Some hold you can walk the length of your entire house, but the Mishnah Berura is not happy with that shitah.
Then why does NOBODY have Netilas Yadayim next to their bed? Because first thing most people do in the morning is relieve themselves, and its a mitzva to do that first. Next, you wash- and your already in the bathroom.
If you wake up in middle of the night to use the restroom, on the way out you should wash 3 times on each hand.
to confirm,
just ask the rabbi;)