While DB has still not opened reservations for August, at present they offer a Deluxe Bedroom. The Munich-Rome itinerary I outlined earlier could just happen.
I must confess I'm leaning away from it. I'm hardly throwing five stars about over my Auto-Train ride last month, and would have had a better sleep in any of the "three star" hotels at which I tie up for en-route overnight stays. Further at my age and preference for privacy, the thought of being "homeless in Rome" is not very exciting. True, I have made day trips from Salzburg (Vienna, Graz, Linz, Innsbruck, St. Anton/Arlberg) and not booked "day room" hotels while away. But I could at any time, got the next train back - an option I would not have if I decided I had enough of Rome.
One final factor thst I know will have some readers "off the wall". My plan was to first go to Munich Airport and store my bag for two days until the flight home. I would then take only what I needed for the two night joyride in a tote bag. That plan to me represents a problem, for on my overseas journeys, my bag is never out of my sight (haven't checked a bag on an airplane in over thirty years). Maybe I watch too much of the TV series "Locked Up Abroad", but the thought of picking it up at EDDM/MUC and there are the "Polizei" wanting me to answer "just a few questions", does not escape me.