1. What are some must-see things to do or cool places to go?
2. Budget-friendly places to stay?
3. I want to go to Hollywood/L.A. for a day as well. Would it make sense to fly into LAX on the first day, rent a car to spend the day in that area, and then drive down to San Diego for the rest of the trip? Or just fly in and out of SD, but drive up to LA?