I also had my son stay home from a meeting. He was incredulous that I was still going. I think the other boys got the hint too.
Regarding the teacher, why not ask how she handles her class, what works, etc. Might be able to get some tips and break the ice.
Also, I think one thing to remember is that you are automatically more interested in scouts than most of the rest of the parents. Where you have been planning the meeting for two weeks, they remembered the meeting twenty minutes before they needed to be there. I always felt there was a bit of divide between the leaders and the parents.