hi,
During fair period, almost all the hotels in Guang Zhou are more expensive than usual.
In case of traffic jam, you can book the hotel near fair centre. the price are reasonable.
there're 4 star hotels, like Raystar hotel, Xing Gang hotel, Tao Hua Jiang Hotel, and Pa Zhou hotel etc, and 3star hotels very near the fair centre.many hotel have the shuttle bus to send you to the fair in the morning.
You can reserved 1 or 2 weeks in advance.
Enjoy your trip in Guang Zhou.