Hi Jelana, it seems you got some very good responses and advices already.
The conference hall is the building that connects directly with The Hilton. As of the WiFi, it is always spotty. It depends on who your wireless service provider is. I have Verizon Wireless and the reception is very good. So I never have to use the conference WiFi.
Another tip I will say is to travel light. I won't carry anything bigger than my MacBook Air. Your backpack will become heavier and heavier as the time goes by. 
Hope this helps.
simon