I was my son's Den Leader for all the years up until Boy Scouts. You would be very good at it, based on your self-professed organizational skills (and your detailed meeting report so far!)
It really is so much fun. I still have my shirt and all the doodads and can't bear to get rid of it. A word of caution on not sewing the badges- we had lots of boys lose their badges once their shirts went through the wash a couple of times. I can sew and could've made a small fortune sewing badges on for people.
One more word of caution- I always did the pinewood derby car with my son, and he did the majority of the work and was very proud of his creations. When we showed up for the 1st Pinewood Derby competition, I realized that I should've given a pre-derby lecture to my son. About 1/3 of the cars were amazing creations done by the dads. They obviously were pros with power tools and made cars that were worthy of an adult competition- but a little upsetting for the kids who actually made their own cars. Check and see if your group does anything to level the playing field. Later on, our group implemented a sort of "dad's car competition" to keep the fancy vehicles from competing with the boys' cars. And make sure you tell your son it doesn't matter if his car "wins". We always had at least a couple of boys storming off and crying when their prized car was the slowest in their heat. If they know what to expect from the start, it won't be so hard to accept whatever happens.
Geez, I've been out of scouting for years and I apparently am still obsessed with it.
