I've not stayed there, but I am familiar with where its at. Yes, it is technically adjancent to DL. But it is behind the parking lot that is behind California Adventure. You can either walk down Harbor Blvd to get to the entrance to the maingate, or there is an area where you can enter the parking lot, walk about 150 yrds, then catch the parking lot tram to the front.
My favorite hotel is the Carousel Inn and Suites which is on Harbor, directly across the street from the main entrance. They have a free breakfast, such that it is, toast, muffins, fruit, coffee, juice. But the view when you are eating is spectacular, overlooking the parks.
They have 1 bath, 2 bath, mini and view suites. I've stayed in the 2 bath suites and loved it. It's your basic 2 queen bed hotel room, with an additional 1 queen with its own full bath attached. With my Entertainment card, I got a rate of $99.
Right in that same area, there is BW Park Place, Tropicana and Desert Inn which all have suites. I've stayed at Tropicana and Desert Inn, but in regular rooms. They were ok, but I prefer Carousel. But if Carousel's full, I check these two. I've heard good things about the BW, but have never stayed since I've always gotten a better rate elsewhere.