Yes, I think the order of golf course lawsuits starts with slip and fall (and then, mostly around the clubhouse) cart accidents, and then ball strikes, with the course liability being greater for surrounding property than golfers on the course. That said, they may be required to fix something that has shown a pattern or reoccurrence. I have seen club insurance policies, and many have more coverage for the pro or GM changing jobs, roof damage, silverware (against theft) and the like than they do for course repair if damaged by weather.
I know for gca types errors and omissions insurance, which would cover design related lawsuits, varies widely, with big market fluctuations. I have paid as much as $13K a year, and as low as $5K a year, so its not terrible.