Hi Lynn,
WDW is a great place for Guests in wheelchairs. Be sure to visit the
Guests with Mobility Disabilities section on the WDW website. Handicapped parking is available at all Resort areas. WDW resort hotels have Handicapped Accessible rooms - be sure to request a room when booking. Your 1st stop in a theme park should be Guest Relations to pick up a Guest Assistance Card which will alert Cast Members that your DS requires special assistance. Be sure to pickup a printed
Guide for Guests with Disabilities when you enter a theme park. Companion Restrooms are available throughout all of the WDW theme parks & are marked on the Guide Maps.
Epcot is a lot of fun & there are a lot of things for guests of all ages. A few attractions require Guests to transfer from their w/c in order to experience including Spaceship Earth; Mission: SPACE; Test Track, Soarin' & Maelstrom. Cast Members are not allowed to lift Guests due to Safety Reasons. If you are unable to assist on attractions where he will be required to transfer, you may want to avoid them.
There are special viewing areas for fireworks for Guests in w/c available on a first come basis & you cannot reserve a spot in the designated areas. These are marked on the Guide Maps.
If your son loves animals, you may want to consider visiting Disney's Animal Kingdom. It is the largest of Disney's parks (& it may get tough if you are pushing his wheelchair if it is not motorized). There are lots of animals in DAK.
I've tried to touch on several areas to give you ideas but I'm out of space for this post. Please come back & visit me with more more questions so we can make this a fun & stress free trip for you & your son. Wishing you many magical memories :) Allison