You won't have a problem as long as you can get good at bear tanking. The group you have is essentially a holy trinity group. One Tank, healer, back up healer the boomkin and 2 dps, with a back up dps, the boomkin.
Its more to manage than 5 shammies but once you get it down it is alsohas more versatility.

First step is getting a focus-less set up so you can use your limited cc. After that just get your cast sequence macros set up.