The OB has got it right. You need to look at the Wi-Fi syncing part. I have enabled this option and it works well.
Sign in to your Apple Account on iTunes? When you open iTunes for the first time, you have 2 options, one of which is go to the iTunes store. When you tap on it, it asks for your Apple account ID and password. That's it for logging in, but to set iCloud backup to automatic, you need to connect the iPad to your PC, you then get an iPad button beside the iTunes store button on the upper right corner of the window, below the search library field. When you tap on it, a page is displayed showing basic info of your iPad. This is the 'summary' tab. In the lower part of the window, there is a backup section, and an 'automatically backup heading'. Set that to iCloud.
