Be bold. Hire somebody who is older. They may just be the best fundraiser you ever had.
People are motivated to participate in peer-to-peer fundraising events for many reasons. As an event fundraiser, your mission should be to figure what is motivating your most valuable participants (Top Fundraisers and Team Captains) so that you can recognize their fundraising efforts in ways that deepen their relationship to your event and more importantly the mission of your organization.