I've never used webdav. You can try it, you can also open itunes, connect your ipad, go to your ipad under devices, go to apps at the top, then look at the bottom you should see a list of apps that can send files, and pick pages and transfer that way.
iCloud.com is really easy, you sign in click on the iwork icon and then upload. On your device, make sure you're signed in with same account (settings-icloud), ensure documents and data is turned on in settings-icloud. If so the documents added to icloud.com/iwork will automatically load in pages. You also have to make sure you selected "use icloud" when pages started for the first time. If you didn't go to your ipads settings, scroll down to find pages and turn on "use icloud".