Hi Lisa!
Welcome to planDisney.
It's always a pleasure to assist my fellow guests from the UK, and I'm happy to discuss the various ways you can travel to your dinner reservation.
Using Disney transport you have a few options to take you from
Disney's Port Orleans Resort - Riverside to
Sebastian's Bistro at
Disney's Caribbean Beach Resort. You can take a boat from your Resort hotel direct to
Disney Springs where you could enjoy a little shopping before you transfer to a bus for Disney's Caribbean Beach Resort.
Alternatively, you could take a bus from your hotel to
Disney's Hollywood Studios, where you can transfer to the Disney Skyliner to take you to Sebastian's Bistro, as there is a Skyliner station located at Disney's Caribbean Beach Resort! The Skyliner is such a nice option - it's a smooth, comfortable ride, with spectacular views from high above the Resort, and would be ideal if you were spending time at the park beforehand. The Disney Skyliner will close 90 minutes after EPCOT or Disney's Hollywood Studios closes.
[
I don't recommend you take a bus to EPCOT to transfer to the Skyliner because the bus will stop at the front entrance of EPCOT, and the Skyliner Station is positioned at the International Gateway entrance located between the UK and France pavilions in World Showcase at the other end of the park - you'll need park tickets and a lot of extra time to walk from one entrance to the other.]
For something more time-efficient, I would recommend using a Lyft ride. You just need to download the Lyft app to your phone which gives you a selection of available cars (with prices and varying pickup times). You make payment on the app before your ride, so it's really simple to use. The driving time between both hotels should be around 10-15 minutes.
Please come back and visit us if you have any further questions, and you can
send me a direct question if you wish. We are always happy to help you plan your magical holiday to Walt Disney World!
Sue