Only concern is the hotel is so large Im not sure how the wireless hookup
will work 20 floors up.

Whether or not the wireless stuff works 20 floors up depends on:

    - Is there an access point in a window at conference floor level?
    - Is there a building across the street off which the signal can
    - Are you on the same side of the building as the access point?

The best upper-floor access in my memory was Memphis IETF at the
Peabody: access points close to multiple windows, lots of buildings
around for signal reflection, and not much metal in the walls. I had
plenty of signal in a room near the top of the Holiday Inn across the