Also, I've been able to book some great deals at the Hampton Inn using Advance Purchase rates (non-refundable). The one on Palm is only a regular hotel but the other one called South Lake Buena Vista has suites rooms. Haven't stayed at that location but have to mention: one BIG advantage to the HI over SHS is queen beds vs. double.
Also, the Fairfield at MV now has a bunkbed family suite room, so you could look at that too.