The AGR award for a bedroom (or a roomette) includes the room and rail fare for either 1 or 2 people. Also keep in mind that the awards are for
ONE WAY! (So a round trip award would be 2 awards. Of course, you could always buy the return trip.)
Also remember that if any of your segments include a trip that include Business Class, if your AGR award includes a roomette or bedroom, you're entitled to travel Business Class.

(You may have to ask for it.)
Example - You get a 3 zone bedroom award from PVD-SAN. You travel PVD-WAS-CHI-LAX-SAN. On the WAS-CHI and CHI-LAX segments, you have a bedroom. But on the PVD-WAS and LAX-SAN trains, these offer Business Class - you can get Business Class tickets for these trains!