The Workshop will be held at the Sheraton Munich Airport.
Both the Sheraton and the NH hotels are reachable from the airport with a shuttle bus. The bus leaves from outside Terminal 1, A through F, and you can find it by exiting the terminal and following the signs to the hotel/crew buses. The shuttle bus costs €8, and leaves every half an hour. See the schedule.
From Terminal 2 you need to follow the signs after you clear customs to your right to the bus terminal and the shuttle bus will leave from Bay 11.
If you are coming by train, you have a few options. You can either take the train to Freising or Erding and from either of these stations you can take the Bus 511 to Schwaig-Oberding where the hotel is. Note that the bus only goes a few times a day and not on weekends. You can also take the S-Bahn (S8 or S1) to Munich Airport from Munich and then take the shuttle bus from the bus terminal in Terminal 2, Bay 11.
Taxis are available at both terminals of the airport and from the Freising and Erding train stations.