The simple Walmart style alarm is my solution as well. The single AA battery last over one year,even in the cold. Nothing simpler or more reliable.
hopefully you'll be waking up to bugling bulls!
Ditto Jay. I was going to say, hopefully bugling bulls close to camp will keep you awake all night. This happened to me once. I was wore out by noon chasing after them all morning.
The best alarm I have found so far is my new GPS. I have a Oregon 450. You set the alarm and then turn it off. At the selected time it will turn itself on and the alarm will go off.
Prior to the new GPS I was using a Sharp brand alarm clock that folds up to about the size of a small cell phone and about half the thickness. It would give time, date, and temp, and the battery has yet to be replaced. It was also lot cheaper than the GPS.