Unfortunately for us, we met Aldo the last day we were in Trapani. He speaks great English and is a…read morewonderfully delightful guide. He will take you everywhere you need to go and tell you all about the city. Being a native of Trapani, he knows a lot about the city and it's long, extensive history.
Don't miss the Island of Mozia to learn about Italy in the 8th Century BC.
Trapani is a busy city without too many places to park. I'd suggest contacting Aldo for trips and visits outside the city and staying in the historic center without a car. Otherwise you'll worry yourself to death over finding places to park.