Boy, oh, boy. If you posted this on the DVC Forum, it would be locked by now. The 2 bedroom sleeps 8 plus one infant under 3. That's it. You get bedding for 8, towels for 8 (one bath towel for each person) and dishes for 8. As for a non-DVC member getting a 3 bedroom unit, that's almost unheard of unless you rent points. And you have to make that request 11 months out from your date of departure. You could also add a studio, then you would have plenty of room.
The one bedroom has a king sized bed. The other bedroom has two queen sized beds. The sleeper sofa is queen sized. You will have two bathrooms, a washer and dryer, plus a full kitchen. The love seat does not open up into a bed.