Most of the locations are within driving distance. As such, renting a car may be your best option to move around Bell Gardens. Uber is also available, but this option may not be the cheapest. If you're up for it, some places are accessible by bike as well.
Travel time for each location ranges from 10-20 minutes depending on the mode of transportation.
If you have more time, you can add a trip to Commerce Casino, another famous card casino in Bell Gardens. For more outdoorsy activities, Rio Hondo River Trail is a great option for a bike tour along the San Gabriel River. If one day is not enough, consider adding an extra day to your trip to see more of what Bell Gardens has to offer.
If you have less time, consider taking out a location or two, maybe some of the spots at the Casino, so you can better spend time experiencing the highlights more fully.