In another life I was (still am a licensed pilot-grounded with high blood pressure) and all aircraft instruments have the capabibility to be switched to red and it will not destroy your night vision. I even have a special flashlight that uses a red light as an auxillary light source.

As a bowhunter I have several Mag Lites. My mini Mag is fastened to my daybag. Years ago I purchased the auxillary colored lens inserts. I also have the Princeton Tec-Matrix Led Headlamp with an extra red lens cover. While I am a strong proponent of using red to preserve my night vision I mist admit that in the mountains where I hunt the red light is not very easy for long hikes. The 4-LED Matrix white light works great and is probably not visible very far; it' s only drawback is that it tends to flatten the trail you are but you can live with that.