Start with a baby sitter and a tri-pod. And even then, the 3 year-old still gets in the way.
We went over to Carmichael figuring that their display would be adequate and not generate an intolerable amount of traffic when it was time to leave. My instincts were correct and we enjoyed the display (minus the car alarm that continued to chirp during the show...I'm still trying to track down the owner of the Honda so I can egg his house.) Every year I see fireworks, I have to watch them through a set of competing trees. This year was no different even when we went to the field where they were shooting them off.
At first, I was a little bummed until I decided that trees can enhance firework pictures. They sort of frame your fireworks and give them shape.