Yeah, we have the clothesline. I was going to take some ziplock bags but I forgot why I changed my mind. I'll put a couple aside.
And unrelated to packing, I do have to say the Rick Steves book is already proving invaluable. I have been reading it but I didn't think about booking things ahead of time. Good thing I decided to try both the Vatican and Borghese gallery last night. Regular vatican tickets were sold out for the days we will be in Rome (!) but I was able to get a good tour time that would fit our schedule. And found a good time for the Borghese gallery but pickings were slim.
I guess I'm really naive on how booked/packed things will be. I figured out it was high season when I booked our hotel (and the prices jumped for our dates) and Rick Steves only confirms it in his book.