Last year there were two sections at the top edge of the World Showcase, one on either side of the store. There was also an area across from Germany.
Your whole party (up to 6?) can go into the area with you. They do ask that the non-disabled stay in the back or sit down so as not the block the view of those who have to remain in a chair.
To get a spot up by the rail, with no one in front of you, you need to get there shortly after it opens. My family likes to get there at 8 and get spots, then send scouts out to find food carts and bring back treats. The CM handling the rope does not have a problem letting them in and out.