Jig, I believe the HES you are referring to is really The Home Entertainment Show (aka T.H.E. Show).
CES is kind of a three-part extravaganza--at least as far as audiophiles are concerned. The "Zoo" is at the Convention Center and adjacent hotels. It is for a large variety of consumer electronics. Everything from game players, TVs, cameras to car audio and HT in a box systems. Any high-end audio manufacturers that are listed for that vicinity are generally tucked away in widely separated hotel rooms and are only interested in meeting with dealers or potential dealers. Frequently they only have their items for show and tell, not to listen.
The vast majority of high-end audio equipment set up for listening is at two separate locations. One location is still part of CES. Last year it was several miles away at a hotel called Alexis Park (AP). There was a free shuttle between AP and the Zoo.
The second location for high end audio is T.H.E. SHOW which is a separate event that runs concurrent with CES. It started as somewhat of an outlaw show and has grown. In 2006 it was held in a hotel (The St. Tropez)adjacent to AP.
The AP and St. Tropez locations were adjacent to each other and therefore it was easy to wander between the two. Both had many, many rooms to visit and it was almost overwhelming.
Be advised that CES is a trade show and not open to the general public. I am not sure about admission requirements for T.H.E Show. If you are elligible to register for CES you need to do a couple of things in preparation.
First, know that hotel rooms fill very fast and I think it is the only event that fills every room in town. Two, start a rigid exercise regimen for legs and upper body. You will have many stairs to climb since both hotels are a series of separate two-story buildings. I think visiting every room is the vertical equivalent of climbing Mt. Everest. You will need upper body strength to carry all the literature available.