All the Packs I have ever seen or been involved with have usually had their Den Leaders move up with their sons. One Pack I have seen has 2 parents that switch every year as DL and ADL that way they don't get burnt out as quickly. It is easier if you have a trained volunteer who all ready has the knowledge and training and has found that niche, but I also remind all the adults I talk to that it's not as scarey to take those reins of a DL as people think. There are loads of volunteers on the Unit, District, or Council level that are more than willing to help you with any problem or guide you in