I use DVD Magic, $34.95 and it's download able. It can create Ipad files, avi files and many other formats. You can also adjust the image res and quility (which effect file size) to your needs. Once installed and set up ripping a DVD to a ipad file is a one click operation.
Once the file is one your computer some place, inport it in to Itunes and sync to your Ipad.
I also have the HDMI plug and a HDMI cable for my Ipad and now I just connect the ipad to the LCD TV in my hotel room. Then I'm able to watch my movies or watch netflix.