Hi Elizabeth,
I have stayed at Saratoga Springs and Bay Lake Towers and think there are advantages to both.
Saratoga Springs I find to be very large. I do not rent a car when on property so I thought it took a long time to get around the resort itself. This is similar to staying at Caribbean Beach which is also a big property. I did love how there were barbeques and laundry rooms at the smaller pools to cook out while swimming and doing your wash. I also liked being able to get to Downtown Disney for an evening.
Bay Lake Towers is great because you are on the monorail for Magic Kingdom and EPCOT. This is such a treat when you have little ones in strollers. It makes it easier to get back for naps or afternoon at the pools. Speaking of pools, the one at Bay Lake is small but nice. They also have bocce ball and shuffle board to play. Also, there is a great arts and craft room for the children.
Another great option is the
Boardwalk Villas because of the great location. You can walk to both EPCOT and Disney Hollywood Studios. This where my family stays. The pool and the Boardwalk are always fun!
If you were happy at Saratoga Springs, I say head back and enjoy making more at Saratoga Springs!
Beth