Does anyone have a breakdown of what you would actually save by off-site vs. on-site? I've been looking at the AoA family suite vs. an off-site condo and obviously that price difference is huge. But what I'm having trouble with is by staying off-site you have to get a rental car (we wouldn't be using the off-site hotels shuttle), pay for parking, and pay for gas. Is there really a huge difference in cost once you break it all down? Or am I doing something wrong? 
Here's the estimates I'm coming up with for Dec 2012:
AoA total = $4,187
Hilton DTD = $4,064

Here's the estimates I'm coming up with for Dec 2012:
AoA total = $4,187
Hilton DTD = $4,064