I can add several things to the above as I have experienced the handicap villas at HH, OKW and BWV. All of my trips have been in a 1 BR.
OKW...Building 11 to 30 are a little different than above 30. They have regular height counters with a disposal and a Fridge that has a freezer on top. Microwaves are over the oven. The buildings above 30 have the lower counters, no disposal, microwaves on the counter and a side by side Fridge so a person in a WC can access the freezer side and the icemaker(in the door). All of the WC villas 1 BR and up have similar Bathrooms. The OKW villas are very WC friendly due to their size.
BWV...The living area is much smaller than OKW and due to that, much less wheelchair friendly.
The counters are lower and again no disposal, microwave on the counter. The bar counter has been moved forward toward the TV to make more room in the kitchen area. This further reduces the living area. If you sit at the back of the dining table you cannot see the TV due to the counter. With the sofa, chair and coffee table it is pretty tight in the living area. Also the bar counter does not have bar stools as there is not enough space. The bath area is much the same as OKW.
HH...is much the same as the above with lower counters, no disposal etc. The living area is larger than BWV but not as large as OKW. If you transfer from a WC to the king bed it will be easy. If you can stand and then lay in the bed, it is very difficult to get up since the bed is low. HH resort is the least WC friendly of the 3 resorts mentioned. As a WC
DVC member you do not have access to the Grand Villas. I've never understood that they can build a ramp up to the General Store at HH but they can't build(or haven't) one to the villas with Grand Villas.
All that said, DVC resorts and DW are a great option for WC members.
Hope this helps.
Of course, OKW has the easy access from the parking close to your door and a easy trip to your Villa.