Not sure if you are still experiencing issues, but if so I invite you to check out our local delivery route planning app EasyRoutes. The routes create in EasyRoutes will not direct you through any parks!
Our app was a Shopify Staff Pick and is well reviewed (5 stars!), well supported, and we offer free trials for business of all sizes.
You can learn more at https://easyroutes.app. I hope this helps!