National BSA provides four-page flyers to help inform new parent volunteers realistically about the tasks included in the position, what is expected during den meetings, and a resource guide. Print and use these when recruiting new adults.
New Tigers Leader: http://www.scouting.org/filestore/pdf/510-233.pdf
New Den Leader: http://www.scouting.org/filestore/pdf/510-239.pdf
New Webelos Leader: http://www.scouting.org/filestore/pdf/510-247.pdf