Very fun area. You might try Pismo Coast Village, it's right on the beach very nice. It is and easy walk into downtown Pismo from here, lots of good resturants and shops. I also like Pacific Dunes Ranch RV this place backs up to the sand dunes, if you like walking in the dunes this place is great, they also have horses for rent to ride on the beach.
If you are there on a Thursday night go into downtown San Luis they have a great farmers market, very large all kinds of local produce plus all the local merchants and resturants take part. Have a fun trip.