Depending on where you're located (East Coast/Central/West) it may not be that much more for you to look into Disneyland as an option. With only two parks located within walking distance of each other (closer than the walk between IoA/US) and tons of reasonable, decent lodging just across the street, a DL trip can be had for about half of an onsite stay at WDW. Of course, you'd have to trade off the cost of tickets if you are coming from the East side of the U.S. or Canada, but there are often sales that can get you pretty cheaply into LAX or SNA. Last year we stayed at the Best Western Plus Park Place Inn. It was right across the street from the park entrance. It was a five minute walk from our room at the back of the hotel to the center plaza between the two parks. Three minutes of that time was waiting for the light to cross Harbor Avenue. In fact, it was a shorter walk than what we had the first time we stayed at the Alligator Bayou rooms of the POR to the main lobby and bus stop. That may be an option to get your Disney fix in four days and not break the bank!