I stayed here before, when I attended professional conference few years ago, so I booked hotel San Marco for this trip based on my previous experience. Great and friendly staff, also serves excellent breakfast! The location is excellent if you want to hangout at the piazza San Zeno area, Castelvecchio which is all within 20 mins slow pace walking. I took the city bus #11, #95(after 9pm return trip from city center) from just infront of hotel going into and coming back from the Piazza Bra, Porto Nuova, Castelvecchio. I would not worry about the distance at all!