Advice from a past DL cast member
Your best bet about hotels is to stay at one in the Disneyland area and rent a car with a GPS for LegoLand and Hollywood. The hotels in Hollywood are PRICEY and the areas are pretty iffy. The good hotels in Hollywood like the previous poster are a good $400 a night.
At the parks, go to La Brea Bakery for breakfast first thing in the morning. They have pastries, some simple breakfast foods, juice coffee, hot chocolate, espresso's etc; and the pastries are fresh and best first thing in the morning.
DO NOT miss Soarin over California in DCA, or ITs Tough to be a Bug. DCA is a fantastic snap shot of California if you've never been here. The Palace of Fine arts is an excellent replica of the original and so are the snap shots of San Fran's warf area.
At Disneyland, take the Walk in Walts Footsteps tour. Its a long tour and a lot of walking and standing, but gives you great info and even for the most avid Disney fan, you will learn something. They provide you with lunch at the end.
Disneyland is the only park you can go in and know that Walt Disney himself, walked on that pavement, rode that ride. In Fantasyland, make sure to ride the cheesy classic rides that have been there for 50 years! Mr. Toads Wild Ride, Peter Pans Flight, Pinoccios daring Journey, Snow Whites Scarry Adventure, etc. They all have distinguished Plaques telling you they are an original attraction. Dont miss the Matterhorn!
Howard Johnsons Hotel is a good one, The Candy Cane Inn has been there the longest and is cute. Not too many have a shuttle anymore, so you'll want to check that. A hotel saying it is "Just across the street" is not as close as it sounds, espically after a day of park hoppin and walking 8 miles!
ENJOY!