A standard room at HRH will accomodate all 5 of and yes you can get a rollaway for an additional fee. Last time I had this room it was $125 with the entertainment book but those discounts seem to be few these days. You can also use CAA for a discount. The next size up in rooms is a deluxe which has a pullout for the 5th person. I paid $155 for this room, but I was able to upgrade to a kidsuite when I got there for another $35. The kids suite was great but they are around $300/night without the discount.