How well does she hold it at night? If she sleeps thru the night, or for several hours at a time, then she does have some type of bladder control.
My suggestion would be to be a bit more aggressive and crate her for a few hours during the day, everyday. Be very diligent about taking her out as soon as you get home so that she will relieve herself on the wee pads. They learn so quickly that I can see her mastering this in no time.
FWIW, I am not a Yorkie training specialist but I have stayed at a Holiday Inn.
