I totally agree that some kind of container or wrapping or bag seems possible. It could buy some time, keep the smells, etc. at least a little in control. Horrible thoughts!
About the possible family blow-up pre-June 16: now I'm not sure whether it did or didn't happen. They certainly had disagreements, and maybe CA's partying since meeting the new BF was causing friction. But Cindy's July MySpace post does seem to show that the move out was not planned or expected to happen. It may be that it sort of evolved of necessity, because something had happened and Casey couldn't go home without Caylee. I can imagine she planted some manipulative ideas with her parents, about mini vacations, bonding with her daughter without them, while she was absent. I can see her making her daily manipulative, "evidence planting" phone calls to the parents. Time was bound to catch up with her, after they didn't see Caylee for so long. I always come back to the question: why not report an accident? She could be the tragic heroine of a scenario like that? There has to be other bad conduct, making the accident inexcusable (like drowning while drugged or something) or something even worse. I wish LE could solve this today, or find this little girl.