Some very good conversation here. As a former SM and a hanger in our troop for the last 3 years, there are a couple of points I would like to add:
1) I am sure we have a lot of young scouts in our group and while it is very fun to discuss our Ordeal memories with other members, let's not forget it is an open forum. Best to keep all descriptions out of this conversation and maintain the mystery.
2) There will always be Troop policies and traditions that don't make sense to one parent or another. While I fully support having the conversation and informing when necessary, if it comes down to Troop politics, please don't make your Scoutmaster's job anymore difficult by trying to force something they are not comfortable with. You can always remove the restriction when you take over the SM position.