They will ride a big Cylon mecha called Sauron.
Your description is epic and I would gladly pay ten bucks to see it. However, you need something dinosaurish. Therefore, I think they should ride a Sauronisaurus Rex, instead. It could stomp around emitting Polish sausage farts and flatten on Ewoks with impunity.
Top Ten Things Overheard At The ANSI C Draft Committee Meetings: (8) I'm on the committee and I *still* don't know what the hell #pragma is for.