What is the easiest way to rip between 3-5 movies and get them on one disc or somesuchthing?

At my wedding in October, instead of the popular photo montage on the big LCD, I am playing silent or black and white horror movies, without sound obviously, because of the music. I need to be able to rip them or download high quality versions of them and have them all on one DVD or something so that my DJ can just pop it in, hit play, and not have to do anything with it for the rest of the night.

My question is twofold.

1) what is the easiest, cheapest (preferably free) program or software I can use to rip them? Hopefully something that allows me to rip without sound, so I can save space on whatever I end up storing them on.

2) if I can rip without the sound, how many minutes could I feasibly fit on a DVD-R? Or would a larger thumb drive or similar device work better?

(I feel the need to point out that I only intend to rip from DVDs that I have purchased or already own—I have no intention of stealing. The only reason for this process is so that my DJ doesn’t have to change DVDs or mess with anything once it’s playing, and also so the films play seamlessly with minimal gaps.)