Driving is the best way to get around Bradbury. If you don't have a car, consider renting one from Los Angeles International Airport (LAX) for about $40-$60 a day. The travel time from LAX to Bradbury is approximately 45 minutes to 1 hour.
If you have more time, you can visit nearby attractions like Angeles National Forest or Disneyland. If you have less time, you can skip some of the activities listed for each day or reduce the amount of time spent at each location in order to fit in more activities.
The nearest airport is Bob Hope Airport (BUR) which is about 30 minutes away. Los Angeles International Airport (LAX) is also a good option and is approximately 45 minutes to 1 hour away from Bradbury.