Carousel has a couple of suites that will sleep 6. The Resort Suite has 3 queens with 2 baths, and the View Suite has 2 queens, 1 king, and a sofa sleeper but only 1 bath.
Desert Inn and Suites can sleep up to 10 and is usually among the cheapest. It is older and worn, but is clean.
We prefer Residence Inn Maingate. It is a little further, but with a full kitchen, and a hot breakfast every morning, you can save a few bucks.
Anaheim Plaza has "family suites" which are actually 2 adjoining rooms. They too are older, but are clean.