There are only 2 bugs that cause me concern here. The fire ant and the black widow
These ants are very aggressive. I have 2 or 3 nests constantly moving around in the yard. The only way to keep them away for a while is to spread fire ant poison over your whole yard.
Then they'll move to your neighbors yard and come back in a few months.
If you stand near a nest, 50 or 100 of them will immediately start attacking your feet and legs. The sting feels like somebody pricked you with a hot needle. In two days a pustule forms and it takes a couple weeks for the scab to heal.
I have found these spiders in my garage many times. They don't like to live in an air-conditioned environment so you just have to be careful when you're moving junk in the garage.