Marrone! I really don't know what the furor is...I did make a slight adjustment in our April trip, and will be visiting Rome two weeks before Easter instead of during Holy Week. But we booked AirBnB's & hotels from Florence to Rome To Salerno to Sicily way back in July, there was plenty of availability & we paid reasonable prices.
Now...I hate crowds as much as the next guy, which is why on our previous three trips to Italy, it's been in October and twice in February/March. I do not like to wait in lines either, which is why we booked The Tour Guy for a Vatican/St. Peter's tour, and we may book an Uffizi tour in Florence. Also booked a driving tour of the Amalfi Coast from Salerno, so we won't have to navigate the SITA bus or the ferry. I'll book the train for our legs of the trip next month when April becomes available. And my cousin's son, who lives up north in Bra, says he will call and do all our restaurant reservations country-wide for us speaking in Italiano. Can't do much more than that...
I think you just have to accept that there will be throngs of people, and adjust accordingly.