It is
illegal for anyone to ask for "papers" in the US - it is the ADA. A Handicap tag is strictly for parking. Many disabled people have "invisible" issues like MS or Lupus and it is up to you to share information with
DVC or not. I explain my limitations because I choose to. If your daughter needs a first floor, call DVC and request it. They have always accommodated me. A HA villa with a roll in shower, on the other hand, has to be reserved when you make your reservation. Just a note, I always bring a suction cup grab bar for the shower if I can not get a HA - not the best, but much safer than nothing. Best of luck!