The key to not being kicked out for winning too much is to win a big sum at once, then change casino. Las Vegas has so many casinos that you probably won't be able to visit them all of them, but if you concentrate on the "high yield" ones (i.e., those allowing the greatest bets), you'll make a great deal of money pretty quickly. At the end of the day, you can even come back to a previous casino you visited: by that time, others will have won the jackpot, and if you dress differently than before you probably won't be recognized.
But what to play? I don't know the maximum yield of slot machines, but I know that the roulette is a sure way to go. Since your bet is multiplied by 35, and that you can win twice in a row without raising too much suspicion, this could theoretically multiply your base bet by 1225! However, all bets are subject to a maximum. I'm not rich enough to have played those maxima, but I would say that finding a roulette with a maximum bet of $10,000 is possible. This could then yield as much as $350\$10,000 is possible. This could then yield as much as \$350,000 per casino ($700\$700,000 if you play twice, "it's my lucky day" style).
Another advantage of the roulette is that it is in fact much harder to cheat (you can't really tamper with the machine without witness), and the probability of winning twice in a row is not that low compared to some slot machine jackpot (but you bet more). So it is less suspicious than winning on multiple slot machines.
Last thing: when you win, cash in immediately in case the casino wants to kick you out without exchanging your tokens for money.
