1. Contact animal control for help. They may be able to give a workshop on not habituating bears to enter your neighborhood. They might also be able to dart, remove, relocate and mark bears. Marked bears that return may have to be destroyed.
2. You live in a gated community, which I assume would have a fairly active homeowner's association. That association can enact and enforce some temporary restrictions on the food sources for the bears, including the storage of trash and recyclables, outdoor cooking appliances, cleaning of game and fish, etc. The association might be able to bring in bear resistant dumpsters so that bears don't have lots of garbage cans to go after.
3. For your home and car I would recommend keeping all food out of the garage and auto. Dogfood inside, no McDonald's bags in the auto. If you have the familymobile with cheerios, etc in the seats clean it out. Close the doors on your house, not just the screen door.
4. As far as walking the dog, it should still be okay. Remember that you are dealing with two animals the dog and the bear. If you spot a bear you need to keep the animals apart. There are pepper spray dispensers on the market for bears. I haven't used them, but I think they are more like the riot control style bottle. That shouldn't be your first response, it should be your last.
I read just yesterday that historically, black bears kill way more people than the griz, proportionally.