I don't know much about the area, but just drove down to El Centro from the Banning Pass area. Forget the hiway, but most of it is a mile or so from the western shoreline. On my return trip I took the road on the east side. What's amazing is, I never saw a boat on this huge lake. Until recently, I had thought that the Salton Sea had at one time been part of the Gulf of Baja. I recently saw a program that said it was the result of a flood from the Colorado River, I believe in the early 1900's. The few resorts I saw all looked to be in a somewhat rundown condition. I know when I was younger, my parents had friends that would spend winters at Salton Sea, evidently it was quite a resort area at one time.
Brian