I use anyDvd to clear the copywrite and then use handbrake. There is a ipad preset for the files which makes it easy to make sure the file is correct type and resolution.
Just did 5 of my dvds last night , took about 35 minutes per using my laptop. Each movie is about 750-800mb. You can greatly reduce the size by adjusting quality like framerate and such. I just did the preset settings.