trigs;299984 wrotei have no personal experience, but i do know of others who have wired money to a vegas casino. they did not have to use the money for gambling as far as i knew. in fact, 'they' consisted of my friend and her wealthy parents. the parents wired i think $10,000 or more to the casino they were staying at just so they could get some 'high roller' treatment. it worked and they didn't spend a dime of that money. just wired it back at the end of the trip. pretty sure they said they've done this more than once as well.
Yeah I know people who do that as well. The other option is getting a line of credit at the casino or a marker for whatever amount you have in your accts at the the time.
If you wanted to get fun you could request a LOC for whatever you had available then wire the money over effectively doubling your available cash. Obv if you blow markers you have to pay it back.
Keep in mind though any wires will be declared at the bank so it is effectively the same as bringing cash over the border (same questions will be asked etc, probably just nicer at the bank)