Coming fro the UK and assuming we get tickets, I thought it might be a good idea to...
fly to Los Angeles, hire a car and take a day driving to Vegas seeing some stuff along the way. See the show the next day and then fly home the next from Vegas.
I've not worked out how exactly that would work timezone wise, but can anyone from the US or with local knowledge tell me why that's a horrible idea and we should just go straight to Vegas?
a lot of people drive from LA to Vegas. Southern California makes up a huge chunk of the annual visitors - which seems obvious for it being so close.
The issue you may run into is traffic - both ways. There is a TON of traffic between LA and Vegas.
If you're going to do the drive (especially while jet lagged) - try not to do the to Vegas drive on a Friday and the to LA drive on Sunday. there are a lot of nightmare stories of people driving back to LA on Sunday on Rt. 15 and having it take 2 to 3 times longer than it should.