I live in Nevada and I have just started to take digital photos and am hooked...I attended an "open to the public" horse event thinging I would love to take some horse pictures...But I found the people more facisinating...I have what I feel is a great shot of the backs of three people looking on and listening to the clinician..Their faces are not reconizable...The clinician's is...I wanted to enter it in an amature photo contest at a local event...Do I need releases even though I am not selling the photo or using it for commerical profit...I believe they are only giving out Ribbons as prizes ...But also, if there were a cash prize whould I then need releases...Denise in Wild Horse Territory, State of Nevada