I live in Ventura, up the road from Oxnard. The Embassy Suites is a nice hotel on the beach. There's a good restaurant inside, the name escapes me right now. I honestly can't reccommend much in Oxnard, though Ventura has a nice harbor area with shops and stuff just a couple miles up the road. You also aren't too far from Santa Barbara, just about 45 minutes. Lots to do there.