Some people get cards and info, others do not (we're in the second group!). It's kind of "hit or miss". If you want the number, you can call DCL. If you book another DCL cruise, all you have to do is tell them you've sailed before and they will look it up so you get the Castaway Club perks.
GET UP TO A $1000 SHIPBOARD CREDIT AND AN EXCLUSIVE GIFT!
If you make your Disney Cruise Line reservation with Dreams Unlimited Travel you’ll receive these incredible shipboard credits to spend on your cruise!