4. Music. Orc music. Lots and lots of it. Loud.
5. Special Orc Wedding Mead. Lots of it. Could be delicious, could be vile. Will definitely be potent.
6. Special Orc Wedding Cake. Think of the scene in Star Trek Next Gen when Riker was trying to acclimate himself to Klingon cuisine.
7. Did I mention that someone needs to die? Seriously, it's not a proper wedding without casualties. If someone dies, the father/head man/whatever should make a big show of paying off the survivors of the departed, thereby showing his generosity.
Have fun with it and play up the extremes.