I am not in UOP yet, but I DO live in stockton, so Ill be happy to help..
Point Blank, Stockton, for out of towners has a high murder rate. Regardless of where you live, the drug dealers move from the hood to the suburbs with their drug money so they'll be even in the nicest of neighborhoods.
There is pretty much six UPSCALE neighborhoods, if you are looking for rooms to rent. The first is on the southside, known as Weston Ranch. The Second is on the northside, closest to UOP, known as Brookside. Third is about 2 or 3 miles away from UOP where alot of retired older folks live, known as Quail Lakes. Fourth is at the northwest end of stockton, known as Eight Mile, Fifth to the east, is Spanos Park, and Sixth, a bit more east of Spanos Park is Morada.
If you are looking for close living to to UOP there are apartments right on Pacific Ave, for pretty cheap. There is a very nice Supermarket down the street, if you look on Google Maps, you will see what I am talking about.
Don't move into Kentfield, Manchester, or Oak Park. I have friends that live there, and it is asian gang territory, although the housing is very cheap. They are the closest apartments I can think of outside of the UOP area.
Any questions, feel free to PM me.