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DVC resorts allow you to book 5 in a 1BR...just OKW, AKV and BLT have bed set ups (sleeper sofa for 2 and sleeper chair for 1) and linens for the 5th person. If you put 5 in, say, a BWV 1BR you will need to provide the bed and linens for the 5th person (we always brought an airbed, blanket and towel for our DS to use while our DDs shared the sleeper sofa).