I thought that bookmarks and stories went with the app when you export and then import.
The problem that I am thinking of is the users need to be the same on both servers. Otherwise I don't know how the new app would recognize these for the users that existed on your other server.
I have not tried this yet. But in my case I load my users on my Dev server using Excel and then they are local users on the server.
When I get apps to Prod the users there will be created using AD. So I'm thinking that could be a problem.