We've stayed at BWI at least twice since the parking alert has been out and have had no problem with parking. We arrive on a Sunday afternoon usually around 3pm. We park in the parking lot that, on the above map, is where it says "Disney's Boardwalk Resort". We usually are able to get in one of the first couple rows. We exit the parking lot, walk across the street to what I believe is another conference center, which on this map is incorrectly labeled "Disney's Boardwalk Villas", and then slightly uphill along the BWI building to the lobby. I don't think it takes even 5 minutes. I'm 60 years old and I can easily walk it, even with luggage in tow.
I believe where you have the blue dots is the conference center parking.
If I am understanding this map correctly, I think it is not labeled very well, shame on Google.