score:2
Yes, you can use any local transportation option that is mentioned on the ticket, for Bavaria, the list is in a pdf document. So this is fine for you.
What is important is that an "itinerary" is different than a "ticket", and in Germany it matters because often you can choose between multiple itineraries to go from an origin to a destination. So, in Germany, a ticket entitles you to use specific trains/buses, in a specific class, for a specific day (for you, regional transportation systems in Bavaria, so no ICE for instance, and the class you pick, your specific day of travel).
There is however no rule on what itinerary you should take (so you can theoretically take a detour to reach your destination). The printed itinerary is more of some help to reach your destination.
Upvote:3
The exact validities of the BayernTicket are not well documented. The DB page (in German) says verbatim:
Mit dem Bayern-Ticket und dem Bayern-Ticket Nacht können Sie in allen Nahverkehrszügen aller Eisenbahnunternehmen und allen Verbundverkehrsmitteln (S-, U-, Straßenbahn, Bussen) mitfahren. Außerdem können Sie fast alle Linienbusse in Bayern nutzen. Zudem gilt Ihr Bayern-Ticket auch auf ausgewählten Strecken benachbarter Bundesländer und Österreichs – Details dazu finden Sie hier. [link removed]
This translates to:
You can travel with all regional trains of all railway companies and all transport associations (S-trains [suburban], undergrounds, trams, buses) with the Bayern-Ticket and the Bayern-Ticket Nacht. Furthermore, you can use almost all scheduled public buses in Bavaria. Moreover, your Bayern-Ticket is also valid on selected routes in neighbouring states and Austria — details can be found here. [link removed]
This seems to conflict with what it says on the ticket, don’t ask me why. A list of the buses you cannot use can be found here. The list is very short considering that you are allowed to use every other scheduled regional bus. It basically boils down to a few where an extra toll fee is required, that are operated by nominally private companies and a few other weirdities. Most importantly for a trip from Munich to Neuschwanstein: All buses that you will reasonably encounter on the way are covered.
The itinerary you got is just for your information. With a flatrate ticket like the BayernTicket, you can do anything. For example, rather than taking the route via Buchloe and Kaufbeuren to Füssen by train, you may choose to pass by Lake Starnberg to Weilheim by train and then do the rest of the trip to Neuschwanstein on a bus through the Pfaffenwinkel. You can also decide that the Allgäu is boring (no, don’t do that ;) ) and visit Salzburg, Nuremberg, Sonneberg in Thuringia or Aschaffenburg instead.
The most important things you need to be aware of: - Do not take long-distance trains (ICE, IC, EC, RJ) - Put all the travellers’ names on the ticket (otherwise it will be invalid).