Hi Teresa,
Thanks so much for visiting the Disney Parks Moms panel with your question. I can certainly understand why with two adults, two teenagers, and an older child that you would want to have two bathrooms!
I would like to suggest that you consider a Disney Vacation Club resort. On the monorail loop, you could consider
Bay Lake Tower at Disney's Contemporary Resort or the
Villas at Disney's Grand Floridian Resort & Spa. At Bay Lake Tower at Disney's Contemporary Resort, all five of you could fit in a one-bedroom villa, which has two bathrooms. A two-bedroom villa at Bay Lake Tower at Disney's Contemporary Resort offers three bathrooms! In order to get two bathrooms at a villa at the Villas at Disney's Grand Floridian Resort & Spa, you will need to stay in a two-bedroom villa.
While many of the villas at the Disney Vacation Club resorts are reserved for members staying using their Vacation Points, there are some set aside for guests paying with traditional payment methods such as cash or credit card. To make this reservation, you can call Disney at 407-W-DISNEY (407-934-7639).
I hope that this information is helpful for you, Teresa. Have a great time planning your vacation, and please do not hesitate to ask if you have any further questions.