JP Lake has a state park (Cedar Hill State Park) off of 1382 i believe. And then 2 parks controlled by the city of Grand Prairie. I'm not sure what their rules are.
If you want to hunt parks go check out the Fort Worth
https://www.fortworthtexas.gov/file...nts/parks-trails-info/2022-park-inventory.pdf
They have a PDF of all the parks, size and the year it was established. Some of them are pretty old. You can hunt in all of them but i'd stay away from those that are like veterans memorials and such. there's also a map that shows the location of all of them.
There's also a club in Fort Worth called Cowtown Treasure Hunters. Their next meeting is actually tomorrow night 5/19/22. you can check them out as well if you're interested.
... from the Land of 10,000 Lakes - Minnesota! 
Happy hunting! 
I still have a Treasure Ace 300 that I use. 
