Out of everything listed, I am suprised none have suggested the humble Photon light. I normally keep at least 2 with me all the time.
A red Photon II hung on a chain around the neck seems like a natural for this sort of setting.
My picks:
1)PT Surge or Brinkman LX (for distance and power,the LX with lithiums would last better on a cold cold night, but i kinda like the Surge better)
2)PT Attitude (waterproof and long running)
3)Photon II or III, red (can run all night as a nightlight and might help someone spot you if they are looking for you)
I would think that you could easily get the LX, Attitude and a Photon II for under $50 if you shop around enough for them.
A Dorcy Cool Blue with lithiums might also be handy, and sure is cheap enough, and you could keep a xenon bulb with you to drop in if you need more light or reach.