I don't think she needed help really. We are talking about a 3 year old? Not difficult to hide or move around unfortunately.
But perhaps you mean she had help in terms of hiding places? Where could she put her is really puzzling me. Tony's apartment while he was away? I think the LE would have found that.
If she drove to some rural area, she put her in a suitcase or something, but she wasn't satisfied with the hiding place and decided to move her from there and had to put her in the trunk? By then the smell would have been horrible.
But I can't see any other explanation. Either this happened on the 16/17/18 and she moved her later and had to leave the car or either whatever happened happened on later dates. But that wouldn't explain where she was those days and how noone saw Caylee during that period. Adding that probably George is telling the truth about the 24/6 visit of her and opening her car, the only explanation is that the child was left someplace for some days and then moved at later dates.