I agree completely. Airfare is the only thing that prevents me from going to Vegas 3-4 times a year instead of the typical 2. There are half a dozen casinos within 90 minutes of me, but they're just not nearly as fun.
The atmosphere is completely different. I'm not a huge VP player. I play primarily slots, and I still have more fun in Vegas, even on the same machines! Bottom line, when it comes to gambling, my money lasts a lot longer in Vegas, but it's more about the whole Vegas experience, not just the gambling.
In Vegas, I take advantage of practically every "excess" I can: alcohol, food, gambling, shows, etc. It's just a darn fun place

Brent