You've got some good answers. First of, all 3 cards mentioned, IHG, Marriott, Hyatt are keepers because the free night off sets the annual fee and then some. The Hyatt has a decent sign up opportunity right now, with a two tier sub. 25k for 3k spend in 3 months and if you can do it, an additional 25K for 3k more spend in the 3 months following. That's better than the 30K I got when I signed up. It makes me want to close my card and reapply.
I'm not at all familiar with the
Disneyland hotel choices, but I am familiar with all three hotel programs. Transferring UR's to Hyatt is as good as it gets. I wouldn't waste UR's on either IHG or Marriott - not enough value in the transfer.
However, IHG points can be purchased fairly cheaply from time to time, so occasionally I've done that.
The value in the Marriott option is pretty much the free night and the sign up bonus.
Since you asked about transferring UR's, the Hyatt card is best overall.
But, if you have the spend, grab a couple of them with a double dip.
For Marriott SUB there is another thing to consider. Chase and Amex both issue Marriott cards, but there are rules about what you can have. I do find Marriott blocks FNC redemptions far more often than IHG and Hyatt.
One more thing: 50k Hyatt points is as good or better than 100K Marriott or 140K IHG.