South California Coast above Santa Barbara

'Fishing charters' gives me pause. I don't think you'll find those in the area you desire until the Morro Bay Area. As previously stated, Cal is not big on FHU state parks. Most facilities are old, in desperate need of renovation, barely big enough for today's larger rigs with slides. Few that are available will likely be reserved already, especially on the weekends. Here are 3 additional suggestions. Avila Beach has a bay front facility with FHU's (double check, it might just be water & sewer, but I don't think so). (I would think charters are there but I don't remember any.). When you arrive, you dry camp until a FHU opens up. Second week of June you might beat the summer crowds, especially if you arrive on Mon or Tues. Maybe. In Morro, Morro Strand RV, a private park, is very nice with FHU's. It is probably you're best bet. Morro Strand State Park is ocean front with FHU's less than 2 years old. I seriously doubt if anything is available there.