We're planning our first trip to Italy. We'll be using public transportation in the cities, but I'd like to avoid paying the high $ for taxis when possible. Is it practical to think we can take our luggage on a city bus or tram to go to/from the hotels and train stations? We each have 1 smallish bag on wheels, larger than a carry-on but not huge. I hear the city busses in places like Milan and Rome are really crowded. What is a realistic scenario for a 50-something couple?