I would recommend their website as well (to be certain on that exact location). We eat at our local GC (breakfast) at least one time per month, and yes... drinks are included (for breakfast only by the way).
It's a bit under $8.00 per adult, we have no little ones so I am not sure on that pricing. Locally, and at the one we have visited several times near HHI, the drinks are included and the breakfast buffet is only on the weekends locally (can't remember about HHI).
What we have found is you need to go early, because there is only so much ham, or so much bacon, per day and once they are out it is not replinished (it is for awhile but as the morning wears on, if they "run out", it is simply out).