I'd probably call the one you are interested in and ask.
Ask very specific questions though (and maybe even if they have pictures they could send you). A few years ago we went to a resort in Northern Minnesota that we had asked on the phone if it was accessible, i.e. no steps (DD was little, so we could deal with a bathtub). They said it was accessible, and it was, once you were inside. But, there were sort of rustic wooden walkways with 2 steps down to get from the parking area to the resort.
As was already mentioned, the DVC villas are accessible with some having roll in showers.