I agree- the 8:30 will have you pulling into Trellis by 9Am and then it's about 35 minutes to RT (taxi) so you could catch the 10AM if all goes well. If you miss it you can always go have breakfast at Capriccio Di Mare and hop the 11:30. Not having a flight to worry about makes it all so much better! If you do decide to try for the 10AM it's best to have a driver arranged. I have a great one if you want.
As VG resident says, you can't do it with an hour between ferries.