Hi and

to disABILITIES!
If you click on where it says "disABILTIES" at the top of this page it will take you to the Index. One of the top items is the "disABILTIES FAQ" which will gives lots of useful information. You will probably find Post #6 most useful, followed by Post #3 and #2.
Or, if you want an easier route, click on the link in my signature.
If you will be using a wheelchair for him, or have a Special Needs Stroller, you may be better off using Disney Transportation. All the buses are equipped to hold two wheelchairs and for the monorails and boats they are very accessible. If you do not have a handicap tag you will have to park in the regular lots and use of the trams may be difficult.