You would really carry extra lamps and hand them out? Not me, the way to learn is to find out what you need through experience. A slow walk out with multiple trips and falls, will enforce the need for them to buy their own lights. Once descending Washington, I ran into group of unprepared hikers. One of the girls was cold, I mean teeth chattering cold. I gave her one of my jackets and said, leave at the trading post, I'll get later. I booked on down, went to Gorham for a bit. On my way back through stopped at Pinkham. Was my jacket at the front desk? take a wild guess, 200 bucks gone.