1, no traffic jam, with 15-20 mins (if near Pier like D1, within 15 mins)
2, SN from 1-1.5hr (BG service time, depends on what kinds of BG u choice), if choice 1 hr service, total should be within 90-100 mins (bath-2 times = 20 mins, service = 60 mins, 10-20 mins others like meals etc.)
3, Best 浴室 is D1-> fast meal, 1.5hr service
    SN like emperior, 18, Sanado etc. la, Rio may expensive than previous.

If to D1, let say take 2:00pm ferry, arrive D1 around 3:20, choice BG then enter room at 15:30pm, finish at 17:00, take 17:15 or 17:30 ferry, arrival HK at 18:30, almost 4:30 hours.

D1 no need to take taxi, just 3 mins walk from pier