Why bring it? I'm getting very repetitive with that question aren't I? Oh well, the flashlight is very helpful at night. It is also helpful if you decide to look inside that cave that you happen to camp next to. It can also be used as a signal for an airplane at night if you're lost.
What kind should I get? Any old flashlight will do as long as it's light and dependable. I highly recommend either a MINI-MAGLIGHT or a headlamp. The headlamps are useful because where you look - the light goes. and the MINI-MAGs are useful because they are very dependable and you can take the top off and turn it into either a flare or a lantern (depending on the use). They even put an extra bulb in the back.