Only public place I've ever hunted that I could pass parking spots is Black Hills, SD.
In PA or FL chances are you are going to have multiple cars at a gate. Where I hunt there just isn't enough access to limit parking to one vehicle.
I am usually first one at trail head. I know there will be cars at the trail head when I exit. I hike in minimum of 2 miles so most places I can avoid people. But other places I know I'll cross paths with hunters. Public land in south Florida is tight.