Hi,
Depending on where exactly you want to go in Aquitaine and the timing of your visit we may be able to help. Do please have a look at
http://www.lagrangedechille.com and see if our converted barn would meet your needs. Four bedrooms, two diubles and two twins (the two twins can also have extra beds). The house is plenty large enough to accommodate your party in great comfort. You have your own private swimming pool for your exclusive use, and there is plenty to do in the area.
You can send me an email from the web site if you would like to know more.
Hope to hear from you.