I posted a general question about train travel in my itinerary thread, but I'm hoping I'll garner more views with a better title. If it's against the rules to post multiple threads about a similar topic, I apologize, and please delete this.
After a ton of research and playing around on Bahn.com, I've come up with the following tickets I plan to purchase. I stuck with only major journeys I know I'll have to take.
Sept. 7: St. Goar to Stuttgart via Heidelberg @ 07:56. Arrival in Stuttgart is at 19:58. €35.90 Sparpreis. https://reiseauskunft.bahn.de/bin/query.exe/en?ld=38219&protocol=https:&seqnr=3&ident=4j.022789219.1563826253&rt=1&changeOutwardJourney=yes
Sept. 10: Stuttgart to München via Ulm @ 08:14. Arrival in München is at 13:12. €23.90 Sparpreis. https://reiseauskunft.bahn.de/bin/query.exe/en?ld=38219&protocol=https:&seqnr=1&ident=56.025613219.1563826347&rt=1&OK#focus
Sept. 14: München to Mittenwald @ whenever. I'm still unsure of the exact advantages of the €25 Bayern ticket versus the €22 Regio-Ticket Werdenfels. I should simply purchase one of these at the ticket machine in München Hauptbahnhof, correct?
Sept. 17: Mittenwald to Frankfurt via Würzburg @ 08:36. Arrival in Frankfurt is at 19:27. €29.90 Sparpreis. https://reiseauskunft.bahn.de/bin/query.exe/en?ld=38219&protocol=https:&seqnr=2&ident=8q.08320219.1563826858&rt=1&rememberSortType=minDeparture&REQ0HafasScrollDir=1
For local/regional trips and trips within cities, it is pointless to purchase tickets in advance, right? For instance, if I want to go from St Goar to Moselkern to see Burg Eltz, will the price be the same at the ticket machine as on Bahn.com? Maybe that's a bad example. The price one way is €12 and the price of a day ticket is €20.60, so obviously I'll buy the day ticket. I can't really think of any longer distance trips I might take. I'll probably visit Linderhof while I'm in Mittenwald, but I have no idea what the total price will be. You take the train to Garmisch and then catch a bus the rest of the way. Which bus company drives that route? Would a Bayern or similar day ticket cover the entire cost?
Any help will be greatly appreciated because I want to buy these tickets before the prices increase. Thank you!