MACAU TO HK VIA LAND

we are planning to go to Macau on Oct. 9 to 12, but we are planning to go to HK on october 10 and we will back on Oct. 11, how can we go there if we will ride thru bus? via land? how much is the fare per person? and how many hours? or if by sea what ferry company? do we need to reserve ticket thru online? thank you.