Relay for Life Walk and Promotional Pens?

Well we have planned our yearly Relay for Life Race. The only thing I hate about this is it's ALL night, and if you don't have enough walkers guess who gets to do the walking? Yep, you got it - ME! By the next day my be hind is dragging! This year we have a sponsor who gave us some promotional pens to give away. The question is who do I give them to? Are they suppose to be for the walkers or volunteers? Oh well we appreciate all the help we can get it's just some help is weirder than others.