Transporting Money

What's the best way transport money to and from LV? I heading out in a few weeks and I want to take about $15-20K with me. This is all "mattress money." I don't want to establish credit with the casino because that requires a link to your local bank. I hate like hell to carry that amount of money on me in cash.

So what's my option? Traveler's Checks? Anybody got a better idea?

GCNE