Another place to look at is the Best Western Raffles Inn & Suites. They have a family suite that gives you one or two queens (I forget), a queen pull-out sofa, and bunk beds (sleeps 8). This hotel is pretty reasonable as far as cost, and I've seen the rooms, and they were nice when I visited last April.
I think they also have a small refrigerator in the rooms, and they MIGHT have microwaves, but that would be something I have to verify. They also offer a simple continental breakfast, which would cut down on meals at the parks.
The hotel/motel is next to the Radisson Maingate, and next to a big strawberry field - they sell fresh fruit there beginning in spring.
I would recommend getting the ART shuttle pass, which is $9 per adult (10+) and smaller kids are free for the duration of your stay.
If you go to one of the top threads there is a link there that shows pics of Raffles.