Just like the imaginary car accident that Zanny had...wasn't it Amy who had wrecked her car & also a friend of TL? I just can't remember the time frame of these 2 and whether they coincide with the Zanny in the hospital story!
I think y'all are on to something with the sand! I've always thought she either left the body in the backyard or laid Caylee on the ground hence the dogs hitting on those spots. But, the sand finally explains the shovel & FCA backing her car into the garage! Perfect sense...she didn't have Caylee in the trunk, she had bags of sand (what did she buy at Home Depot??) and yes, they are indeed heavy! She had to have the shovel to get the other sand out after she removed Caylee....couldn't use GA because he changed the lock.
Time of day? If she did it early enough, things would look back to norm by the time GA/CA came home.
Then she bagged up Caylee, took her around the corner, bag tore, stain in trunk (which I think probably disgusted her) so she just threw her & that's why she wasn't that far into the woods. The clean up is as you said earlier. So, if this was the same day as the "gas can argument w/George, could it be he didn't smell the decomp because Caylee was bagged?
Or, had it not began that process yet?
And, if it had began to smell with Caylee being in the sand for a couple days, wouldn't they have smelled it when they took the dogs out?