We stay there all the time. Only issue is freeway noise. There's no getting away from it. Park is nice, spaces are large and it's usually pretty quiet aside from the freeway noise. The park has been full recently with "transient" workers, the higher paid specialty kind, working on the various projects in the area. No issues with them they are just there to do their job and then get home to their families every few weeks or months.
Bring your favorite ant repellent/poison and spray around everything. We got invaded last year after two days when I failed to spray.
BTW $300/wk is pretty cheap in these parts. Check Prado Regional park a few miles away they are $225/wk full hookups two weeks max. Nice park but you get more traffic on the 91 during commute hours (which is just about 24hrs a day any more).