The ones to look for are called 99 Cents Only stores. Lots more fresh foods than Dollar Tree.
CA/NV/TX: 8am-10pm
AZ: 8am-10pm
Seems to be a bit limited in locations. Too bad.
Just got back from my monthly trip. Hubby eats alot of canned soups, etc. and it is always cheaper there. During the month I buy alot of produce there. My mom used to eat almost totally out of the 99c store for between $15-20 a week.