Landscape Architecture Masters Thesis which features interviews and site analysis of 4 southern Cal courses:
Oak Grove, La Mirada, Yucaipa & Murrieta:
http://www.thesisabstracts.com/ThesisAbstract_736_Disc-Golf-Course-Design-Inscribing-Lifestyle.html (http://www.thesisabstracts.com/ThesisAbstract_736_Disc-Golf-Course-Design-Inscribing-Lifestyle.html)