You'd better to stay one night in Wuzhen, or you may miss much beauty of it. Come to Wuzhou from where? You can get to Suzhou or hangzhou first. Then take regular bus to Wuzhen. There are hotels in the town, but I think better to stay in an inn, hostel or homestay. Generally, do not worry about a place to stay. You can find one when you arrive there. Choose a home inn for one night.