I would recommend the HOJOs (Howard Johnson's), it is about a 7 minute walk to the plaza. I like their rooms. Check out their website for more info:
Disneyland -* Howard Johnson Anaheim - Disneyland Vacation - Disneyland Hotel - Anaheim Hotels, also go to their 'Boards' section too. Great info posted.
And if you have any additional questions, call their local reservations line and talk to Lorealle, 714-618-6025