I would like some input, especially from those in the know about liabilities and such concerning posting photos on the web of people and children.

Here are the specifics.  My church sponsored a fall festival on October 31 as an alternative to the normal goulish type Halloween function.  It was free and open to the public. It was outside but on church property.  Over the years it has turned into a very big event in the community.  This year attracted thousands. (Free food, candy, rides and games will do that).  I was asked by the church to bring my camera and shot pictures, no pay involved.  I got some great shots of adults and kids all dressed up in their costumes.  I especially prefer the candid shots of people caught up in their own little worlds of joy.

Now that I have the photos, what should I consider before posting any shots on my Facebook, the church's Facebook, here at R'osity, etc... 

Please weigh you opinions considering that adults attending and children were dressed up intentionally to be seen.  This would not be the same as if I were at a public park or sporting event photographing people that were assuming some amount of privacy. 

I liken it more to people, young and old, marching in a parade rather than the bystanders watching the parade.

In a lot of cases the parents where standing right beside the children and were watching me take the photos.  Everyone was happy (except the kid that didn't want to leave).  The only adult to ask me about anything wanted to know if they were going to be on the local news. 

Your advice is appreciated. 

Just as a sidenote I know there would be no problems from adults and parents who are church members.  Those familiar with Facebook know it is a social site where everyone post and tags everyone else all of the time.