No reason why larger ferries wouldn't run. On the schedule for booking, though I didn't try to complete the booking, step 3 and further.
Are you getting a notice of not running ???Edited: 1:35 am, November 03, 2017
Perfect. Thanks for the information. Much appreciated :)
For anyone interested, the first ferry from phuket leaves at 08.30 (15 minutes late, so 08.45).
Costs 600baht to phi phi, one way, or 1000baht phuket - phi phi - ko Lanta, one way.
Were you referring to the ferry times at PhuketFerry.com? Coz I was also able to book with PhuketFerry. It pushed through and booking was pretty easy. Also got it for around 600 THB. If you found that price on another site, PhuketFerry can give you a much lower price than that. They usually give that kind of offer based from my experience. Anyway, many thanks for this information. Safe travels!