I am not sure about releases, but it seems to me that if it is not for profit (sales) then you would not need them. I do this type of thing for my son's gymnastics team. If the parents ask for the photos, I usually give them a disk with the originals, edited and cropped to 8x10s. I do not photograph for a living and I do not take any for newsprint ect. Just one parent to another. I have been offered money for them, but like I said one parent to another. Last year the team did get me a gift certificate to the camera store I use here for my troubles. Was a nice gesture.

I think you will be ok with giving the DVD to the parents without a release. I think it is up to you if you want to charge through.

Just my .02

Phil