All that Amtrak does to make a "bedroom suite" is open the divider between two adjoining bedrooms (C&B or D&E). You still pay 2x the bedroom price, and 6 will pretty much only fit in a "day" arrangement (2 ppl on each bunk, and one on each seat opposite the bunk). The third person in each room really won't have a place to sleep at night, unless they're okay in sleeping in a chair with no recline or adjustment, and limited legroom (due to the folding down of the lower bunk). You will have to call Amtrak to make sure that they assign your rooms together. I'm not sure if they make a remark about the "bedroom suite", but it looks like it just takes a conductor's key to open the divider, so if the SCA forgets, they can do it enroute.