How to Download and Set Your Wallpaper
The process of downloading wallpaper to an iPad is essentially the same as the process for saving pictures to that iPad and then assigning it as the iPad wallpaper. The images that you want to use for iPad wallpapers are going to be ones that are size appropriate and fit the dimensions of the iPad itself, but you can still easily use random pictures and then assign as iPad wallpapers.
If you are looking at websites for free iPad wallpaper then you will want to select the image of choice and have it brought out to its full size. From here you will tap and hold it so that it will give you the option to either Save Image or Copy the image, and you will select to Save Image.
This will bring the image into your Photos section, where you can then select it to bring it up. Once you do you will select the icon in the upper right hand corner that looks like a square with an arrow leaping out from it. Here you will see the options Email Photo, Use as Wallpaper, Print, and Copy Photo. You will select the Use as Wallpaper option, which is the second one down.
This will reposition the photo so that it fills up the screen in the orientation that you have selected. In the upper right hand corner you will see three iPad wallpaper options: Set Lock Screen, Set Home Screen, Set Both. This will allow you to choose where you want this to appear as your iPad wallpaper at, or if you just want it to be the blanket wallpaper. Once you select the one you want you will have successfully set the iPad wallpaper that you downloaded.