The Kindle Voyage has page turn buttons, and any frontlit ereader can turn off the light.
But you cannot disable the touchscreen. TBH touchscreens are where everything is headed... I do remember @baf made a hack, "Kindle Untouchable", which disabled the touchscreen on the KT and use the home button instead. Possibly something could be worke out for the Voyage as well... if only we had a non-serial-port jailbreak.
The Voyage is capacitive touch, so if you wear gloves and use a stylus it won't register your touches.
Whether that is what you want, I do not know -- but I seem to remember someone else asking more or less the same question and being satisfied with that suggestion.