dax702, reading through this thread, I was initially going to recommend you take a look at the many 5mm LED cluster lights available ... although nothing like that 128 LED monstrosity you posted a link to (gimmicky - too fragile).
The more modest cluster lights provide a nice, usable fog pattern for close-range work and are easy on batteries. However, they are lousy on "throw" ... projecting light at distances 100' or more. Some are even mostly washed-out at 50' - 75'. Prices range from $5 -$30+.
However, LEDs, even modest ones, usually show up animal eyes and they will look like two small keychain lights looking back at you .. even over great distances. So range with a light might not be too much of an issue.
Anyway, if you want to run out and buy a terrific light right now, go to Home Depot and buy a 3AA MagLED. One 3-watt LED with a very nice beam which you can focus from fog to (mostly) spot and it comes with a holster in case you need your hands free suddenly. As noted above, they have a 2AA version ... but the 3AA is brighter, has a longer run-time and is not much more cumbersome. Prices range from $19.97 to close to $30 stateside.