Anaheim Harbor RV Park is a small but decent campground about 1/2 mile north of Disneyland. The shuttles or city bus stops right in front. There is also a nice family restaurant right next door.
About 1/2 of park camp sites appear to be long term types. All the sites are blacktop and can accommodate 40-foot RVs plus tip-outs. They have Full hook-ups, plus 30 & 50 AMP service. Amenities include a heated swimming pool, playground, a large new laundry room, newly constructed bathrooms, Free wireless internet access, Free cable TV hook-ups, a Mini Market, a five hole putting green, and a video arcade.
The staff is very helpful and will arrange a rental car if need be. There are also great views of Disneyland fireworks without leaving the park!