hello,Mr. Gigi.if you can book a ticket to BaiYun airport it will be the nearest airport as it is located in guangzhou. but if not maybe you should go to HongKong first and then you can go to guangzhou by ferry or take a train, both are very convenient.
i myself stay in guangzhou now but i don't know the Jiangou Hotel, but if you want to know how can you get to the hotel from the airport it is easy because most of the hotels will have the bus which pick up their guest from the airport. so the only thing you need to do when you arrived at the airport is to find the bus of the hotel.
if you have any other question you can be free to contact me by sina.com.cn|sophiekp.

Thank you Sophie - I followed your advice and booked my flight into Guangzhou airport and decided to stay at Marriott hotel because it made me nervous that you did not hear of the hotel I mentioned.