heres some info.
There is actually 3 options there
1. Westin with Chabad,
It's connected to the fair complex, and they have reserved shuttles to take you between the fair buildings.
The hotel starts on the 20th floor, (by last fair they provided a Shabbos elevator) the lights on the stairways always went on even though the hotel promised that they shut it, The food is so so
2. Ritz with Khilas Tzion
The hotel is beautiful, food is very good (they bring in the food from HKG) the only thing is that its a 20-30 min drive from the fair.
3. Hotels near Chabad
In busy fair season could be there 3-400 people the food is so so, and its far from the fair ground.