Vista Bed and Breakfast is a hidden gem. My husband and I stayed at the Vista B and B to celebrate our 12th wedding anniversary. It was a romantic and relaxing week. Our room had french doors opening to a pool, hot tub, and beautiful views. We got the best sleep we had in a long time because of the quiet. The owners couldn't have been nicer. They even arranged for massages at the B and B.
I would also recommend walking at the pier at Oceanside Beach and visiting Temecula wine country.