I know it's a strange idea, but what about CEMETERY. Usually, during the day, not many people there and if someone could see young girl doing some 'gardening work with shovel' around the fresh burial place - noone would be suspicious...looks like th caring person...In addition, it's safe because LE wouldn't bring dogs there...However, it worth to get dogs there because if she used the cemetery as the hidden spot for Caylee's body - dog would pick-up the smell right away because body is not in casket...sorry, pretty gruesome idea...but very possible one, isn't?....
BUT, where!!! Which cemetery?? how did she get there? How did she do it?