We are taking our three children and my parents in December...you'll absolutely need the two bedroom. My parents are getting the secondary bedroom while my husband and I get the primary. Our three children (ages 5, 3 and 3) will get the pullouts in the living area.
Also, there are two types of two bedrooms-
Dedicated-true two bedroom
Lock Out-This is also a two bedroom but, the second bedroom has a kitchenette in it. These two bedrooms are actually an adjoining one bedroom and a studio that can be used as a two bedroom when the adjoining door is opened.
HTH-