what about on the haunted mansion? will he get to see the room with the paintings or do we go in another entrance?
If he can stand and walk long enough for the several minutes of the room with the paintings and then walk to the regular boarding area, he will be able to see the stretching room (the room with the paintings).
You wait in the regular line until just before the regular line gets to the building (there is a turnstile just before the line goes into the building and the line from that point is not assessible).
There is a hearse parked to the right of the regular line, with a chain marked with a wheelchair symbol. That's where people with wheelchairs and ECVs get out of line; when you reach that point, park in front of the 'wheelchair chain' and wait for a CM. That puts them on the exit side of the ride; the CM there will ask whether you can walk about 200yds and stand for the preshow (the stretching room). If you can, you will leave the
ECV parked there at the exit and go thru a back door into the stretching room. From there, you will board in the usual way.
If you can't, you miss the stretching room. You will directed to park the ECV and when it is time to board, you will go about 100 feet ahead to the exit to board. The ECv will be waiting for you where you left.
For people like my DD who can't walk, we can bring her wheelchair into the exit and as close as we need to the ride car for boarding. The CM then takes the wheelchair just outside of the actual exit area to wait for us.
what about splash mountain? he can get in the boat himself but how do we get the ECV back if its on the other side of the river?
At Splash Mountain, you will wait in the regular line (or Fastpass line, if you have Fastpasses) until the line comes to a part with stairs. At that point there is a chained off pathway with a wheelchair symbol on it. If there is no CM there, wait there for one to come and direct you where to go. You will be brought to a small waiting area with benches that close to the exit (near where people pick up their pictures from the ride). When it's time for you to board, a CM will come from the exit area and lead you to the exit. The ECV will be parked there and waiting for you when you get off.