Actually, the odds bet would increase variance but lower house edge. But it would look like you're betting a lot of money if you take full odds.
But you don't even have to play, you can just bet about $200 total on pass and place bets the first roll when the pit boss is watching to enter your average bet, then just stand at the table and collect comps. If the craps table is near the blackjack pit, be excited and loud enough to be noticed by the pit boss.
Then again, there is a way to beat craps with dice control, and there are some people who make a living off that, so if you're already "red hot", playing craps is not that great of a cover. Roulette is a better cover, albeit more costly, since it's thought to be unbeatable, and you can use a phony system to show that you vary your bets wildly at any game.