The important thing is not to rely 100% on whatever lighter you choose to carry. The boys in my son's Scout troop have taken to carrying fire steels and appropriate fire-starters instead of lighters. They are much less prone to failure and repeated use provides excellent firestarting skills.

Unfortunately many of them still need to learn the proper way to prep for and build fires. They tend to gather a small amount of wood and then yell for others to go get more wood while the flames run out of fuel.

By the way, my favorite refillable lighter is the Solo Candle Lighter It looks like a regular lighter, but the lighter nozzle extends out to make lighting fire-starters tucked under kindling much easier.