Desert Inn and Park Vue get booked very early -- good luck. I tried to find those for October, no suites available on my dates.
Homewood is the closest, best-quality/value family-suite experience for 6 that I've seen. Fully decked out kitchen and living room space. Get 2 for 12 max total. No guarantees on inter-connectivity, but suites are nice in and of themselves. Residence Inn is more expensive, same type of benefit, looks even nicer. Generally people will shuttle from these, though you have the option to do a 15 minute walk.
To save more money, you can take Homewood Maingate another block south in Garden Grove. Staybridge and Peacock Suites one block away east toward the freeway. Substantially cheaper, less than 10 minute shuttle. You're probably shuttling anyways from residence inn or homewood convention center, so difference is only a couple of minutes.