I've made one for someone who also hunts. Here is what works best:
R/O (red oranage) luxeon, mounted in a 2D or 2C maglight using a cut down reflector. I suggest you get the hotlips or o-sinks for heatsinking, it will make it lots easier and you'll center the led perfectly.
Red luxeons look pretty much like R/O luxeons. but are way way dimmer in comparision. I have both and they both look about the same in color. The red isn't a deep red, it's a car brakelight red just like the R/O. Very hard to tell the difference in colors.
Anyways, It works GREAT. Animals can't see it at all (unless your right in front of them!) and as an added benefit, their eyes glow red back at you. You see animals eyes that you can't even see hiding!
Batteries last forever (DD 2d or 2c) since they only pull 300-400ma. And the guy I built it for wanted 100yards, well Ive asked him if it lives up to what he wanted and he said it's better!