I have a load of Euros which I want to change to US$. Given I am from the UK, in theory it should be better for me to change them when I arrive in the US, as otherwise I would have to change them to pounds and then to $, losing out twice on the buy/sell spread. However, I recall the exchange rates at McCarran were terrible (as they usually are at airports). I believe you can exchange Euros to $ in the Casino cages, but I have no idea what the rates are like. Has anyone tried this?