I was a Cub Scout and made it to Tenderfoot as a Boy Scout before quitting for sports. When our son was going into First Grade my wife came home from a Parent Teacher meeting and said some one from Cub Scouts talked to them and that this would be something good for our son. That was 11 years ago and at first I didn't want to be a leader, but ended up being his Den Leader, Webelos Leader, CubMaster, and when he crossed over Assistant ScoutMaster and now ScoutMaster. He made Eagle Scout last year and is now an Assistant Scoutmaster. I also serve on the district Cub Scout Round Table and District Committee.
The recruiting lesson I learned over the years is you will find a small number of people who really want to help and those who run away as soon as you mention you are looking for Leaders.