They have all the info on the site since it may have changed due to Covid! Yes to camping yes to fishing !
Parvin State Park offers both camping and fishing. There are several spots around the lake to cast off. If you plan to just spend the day, you don't need to book a campsite.
I'm not sure about camping but here's their number so you can call and find out.+1 856-358-8616
There is overnight camping. I would expect that you would need to make a reservation. Just Google Parvin State Park the site will have all the details
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