My hubby & I did the whole Disneyworld Fairy Tale wedding package 8 years ago & my Grandmother (my inspiration for getting a Yorkie) wanted to bring her Yorkie, Penny, to the resort (Grand Floridian). She ended up using the kennel there at Disney & had no problems whatsoever. More than anything, she just missed her little girl. I don't know about all of the requirements (i.e. walking) b/c I was too busy getting hitched & all, but I could find out if you like.
Edited to say -- Considering Disney's dedication to detail down at Disneyworld, I would imagine the facilities are 100% top knotch.