I was there in winter and don’t recall any bugs at all. There are I imagine the regular wildlife-skunks, raccoons, deer, mountain lion ( which you are highly unlikely to see). I always pack feet-free repellent and a Citronella candle, but didn’t use either.
BTW, the park is beautiful. I decided to dry camp as the non-electric campgrounds were much nicer. The spaces in the campground with hook ups were pretty close together and the area was very shady. I love this campground.