I don't know if this will assuage your concerns any, but the con is bidding for the convention center. It's got a hotel attached, and I'm not sure if there's any way they can give preference to PWD in booking that hotel over the ones across the street. (The two other hotels are across the river, which I'm told is a 5-minute slow walk from the CC.)

(I volunteered to help with the bid at WorldCon this weekend, so I'm not one of the people making the decisions. If they win and I'm suckered onto the concom, I'll do what I can to make sure that disability issues aren't ignored. The smallish steampunk con I help run in NC is very aware, though we were limited by the hotel.)