Upvote:2
Yes, enjoy your trip. You do not need any extra documentation. If you are going to Austria for your meeting and after that you have time feel free to roam around the Schengen zone as you please.
You do not need any extra documentation for that. And as long as you remain within the Schengen zone your single entry visa remains valid even if you move from One Schengen country to another Schengen country.
You can take a flight, use a road, take a ship or just walk into another country there is no restriction on the mode of travel within the Schengen zone.