My family of four will be traveling from Munich to Salzburg on May 29. I have found a Bayern Ticket on the DB website..I understand the Bayern tickets are from 9:00 am on but the website shows an 8:54 am departure for 35 euros(the bayern price) so I can only assume they allow this earlier (by 6 minutes) departure. Is it wise to go ahead and purchase now online? I assume there is some risk to this particular train selling out?? Thanks for your help!!