Ok, it looks like I am going to be in LA area 12/22 & 12/23 by myself and then Allison and I both are coming back to LA 12/27 & 12/28.
Let me know what your plans are on those days...
Vegas has a proper theme park. In Fact, I was there two weeks ago. Adventuredome at Circus Circus. Dont forget about random coasters at Sahara and NY NY. And rides on Stratosphere.
The whole town is kind of a giant theme park too.