Actually the guests being more aware of it being a fake will probably help sell it...its far easier to laugh if you know the loud wo hoo girl in the back sobbing and slurring "But you said it'd be forever,bastard!" is a fake
I love the the Trek/ Star Wars mixed marriage idea...Geek this party out....get even more obscure...
"Whomsoever objects to this union prepare your bath'let and dagger so that you may fight on the field of honor for today is a good day to die" (several Klingon war howls at this point)
"With this One True Ring I thee wed",
"With this Ring of lightning and its +2 damage I thee wed."
"By the power granted to me by the state of california and the united federation of planets"
...nothing like a Vulcan mating fight with the figt theme music blasting out've a boom box to get a party started
...action figures and ship models make great center pieces...
...a handfasting ceremony done with a Tom Baker DrWho scarf..."by the power granted me by the state of Wisconsin and the Council of Gallifrey, the seal of Rassilon,the Sash of Rassilon etc;"