Working with vegan cream cheese icing?

Hey everyone. I'm making a vegan carrot cake and cream cheese frosting for my friend's birthday, I'm not vegan but I do bake a lot. Can anyone advise me on how vegan cream cheese frosting is to work with? The decoration will not be crazy but will have the 'vintage/Victorian' piping style so it is somewhat intricate and so I need it to hold its shape. I also need to travel with it for probably 2 hours ish in a car, it will be refrigerated beforehand though.

The icing will consist of: ASDA free from cream cheese, vegan Flora block butter, icing sugar, vanilla. As basic as I can get pretty much.