Use a headlamp and possibly a backup light, something that runs on regular batteries (AA or AAA). Trust me, basically ANY headlamp and light will do for this trip. If you don't like headlamps, get one anyway. If you don't believe me, get a cheap 3*AAA headlamp and test it.
But - you're looking for something nice, aren't you? Something you would want to keep and use
Then think a bit about what you would like to see in that "future use". If that is unclear, then go for a general purpose light with convenient form factor and AA batteries.
There are several good suggestions already. Here are mine:
Headlamp: My favorite: Zebralight H50. But the other ones mentioned above are good as well.
General purpose light: Fenix LD10 or LD20. (one v.s. two AA batteries).
And - although these light will work quite well on ordinary alikalines, you will get much more stable performance, better runtime and brighter light with low self discharge NiMH rechargeable batteries. Get some Sanyo eneloop and a good charger. (A good charger will charge one or more battery independent of the others, so it won't matter if one battery has 75% and the other has 20% charge. ).