Hi Jana,
Big family trips can be fun but also stressful. Make sure you work out guidelines for touring times together and meals prior to heading out on vacation so you can have a great vacation!
Since you love Port Orleans Riverside (POR), you could have to adjoining rooms here. One would be with the trundle bed and one without. We have done this and it work out nice.
One options you might consider is a two bedroom villa. There are villas at Animal Kingdom, Bay Lake Towers, Old Key West and Saratoga Springs which can accommodate your family in one unit. Some advantages to a villa versus two single rooms is the ability to make meals in the rooms. While some people do not like to cook on vacation, I know people who do and this can save money on meals while touring.
The
All Star Music Family Suite with an additional room is a great option as well as it would provide a small kitchenette to make breakfast in as well as provide you with an additional bathroom which is a big advantage. Plus kids love the theming at this resort.
I hope this helps with planning a wonderful vacation!
Beth