Originally Posted by 2manybikes
It might be a freewheel. If you drop any small parts in the snow do I get to say " I told you so" ?
You do the free hub, and I'll make the cocoa to save time.
Sorry to hear about the light, do you know how many cycles or hours or years on the battery?
What lights/light are you considering ?
Make my cocoa nice and strong, then, I'm powered by sugar

Good point about the freewheel, although it would be a simpler thing to swap whole freewheels than performing freehub-body transplants...
That was the second battery for that light system, and I used it on my commutes as well as night rides, so I would have to guess 300-500 cycles. Took a darn long time to charge, too. The lady at NR said that it was only charging to partial voltage. It was a NiCad, not the newer NiMH ones.
For a new light, The Voices are in disagreement. Some of them say
mech! Buy a cheap, bulletproof Trail Rat 2.0 and put a 15W bulb in it! 
but then the other ones say
Bah, those are cheap but they have a 9-hour dumb charger and you KNOW you'll forget to unplug it when you're supposed to, plus that's only good for 1hr 50m or less. Buy a new NiteRider Classic Plus dual-beam with the smart 2.5-hour charger and the 3-hour runtime!!!.
And then the rest of The Voices remind me that I've sunk plenty of money into bike stuff, and suggest that I put rechargeable AA's in my little Cateye EL200 to serve as a bailout backup to my NR Flamethrower, and live within my means
To post something useful to the OP... what about driving partway, the part where you're really far from assistance, and riding the safer part? Discretion is the better part of valour, etc.