Where to start, lol? I am a bit tired and as always I am a bit of a dither brain. CMs rock and are very helpful unless you are an SG who has an attitude problem and pushes their buttons too many times.
At Mickey and Friends Parking Structure is handicapped parking in the bus parking area as well as near the elevator on each floor but it is a mile hike (bad knees so it seems like it but is 2 blocks) and the trams can carry
ECVs and wheelchairs. California is a reciprical state so you disabled plates and plaques will give you disabled parking. A GAC is necessary and Disneyland has a lot of exits and back door type of entries for disabled. The Tiki Room requires using an elevator for example. DCA is more modern such as the disabled loading area on the rapids ride. At DCA the paths are wider and there are more lines where the disabled use the main line. Disneyland has more uneven walkways, curbs, and other disabled hazzards than DCA.
WARNING: Anything you read may change as DCA is undergoing a 5 year construction project that started the beginning of this year, 2007. This can mean road construction and other problems.
Disney Hotels:
Paradise Pier Hotel (Whatever its name is) is a tall building that is disabled friendly and I love the food. It is the farthest from the parks and and is a long walk to the monorail. They used to have a tram a block or less but check with the hotel.
Disneyland Hotel is a bunch of high rise buildings and the farthest is two blocks from the monorail. Great food and shopping. The closest is in the corner near Downtown Disney and about a block away.
Disney's Grand Californian has an entrance into DCA and is located between the Disneyland entrance and the Monorail. A block to the monorail or to the park entrance maybe two blocks.
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Dropoff zone: At the front of DLR is a handicapped dropoff zone. There is a road there which has dropoff zones for hotel busses and a taxi zone. Public busses drop off on the main street and do not come into the park at all. The hotel drop off zone is about a block but some guests do miss that last bus.
Monorails: the last monorail leaves the park at closing time so do not miss it or you have to walk from Tomorrowland to the entrance to the park then a half mile to the hotel. The length of the downtown disney district.
The monorail stations have elevators and can handle big ECVs. They open the gates at the same time as the parks so you can be in Tomorrowland about the same time as the thundering opening crowd hits Tomorrowland.
Trains: Disneyland Railroad has a rear car that can hold the big ECVs and has a few bench seats for your friends but it is scary for me as there is almost no back to those seats. Disabled guests wait at the marked area near the exit. There is not ramp at Main Street Station though.
Bathrooms:
http://www.mouseplanet.com/potties/
Bugsland at DCA has a companion bathroom. DCA is better than DL for bathrooms but DL does have disabled bathrooms. California laws says that a person of the opposite gender go with a disabled guest into a bathroom of either gender. Disney frowns on kids above age 6 using opposite gender bathrooms though. Yes a man can go into a woman's bathroom to help his daughter or vice versus.
Nurses Station: Helpful people that have quiet beds for resting and this is the place for changing clothes on disabled kids, medical stuff and storing some medical supplies.
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http://disneyland.disney.go.com/disneyland/en_US/help/gsDetail?name=MobilityDisabilityGSDetailPage
That is their guide and there is a PDF version of the guide book.
DCA Rides: Watch
youtube to see what you can ride. DCA is the second park in the country built after ADA came out. One seat at the games can be removed so wheelchairs can play. The sunwheel allows wheelchairs to board. King Triton Carrousel has a ramp and wheelchairs only may park where the bench seats are. The rapids ride has a parkiing spot for the disabled rafts so that guests can takes as long as needed. All nonshows except the sun wheel and carrousel require transfer.
WARNING: Bugs Life seats have a thing that pokes people in the back and cause me severe pain when it missed my damaged disc by an inch. Imagine someone poking you in the back with a stick and you got a damaged disc.
Disneyland rides: All rides require transfer from the wheelchair to the ride except for 8 rides. Mark Twain, Monorail, King Arthur's Caroussel and the train are
ECV accessible. These four will accomodate a wheelchair not an ECV: The Many Adventures of Winnie the Pooh, Buzz Lightyear Astro Blasters, Small World and the Jungle Cruise.
Ride Warning: Some rides do not have adequate chest restraints to hold a person upright if that person has little upper body strenghth. On Splash Mountain a person could hold such a person but other rides like Soaring make it hard for such a person to remain upright.