RE: Car scouting
Here is something I found that was written by Ray Eye.
"I continue to believe the best way to learn how to call effectively is to actually get in the woods with them and call turkeys.
Locating turkeys with turkey calling prior to the season will teach you a lot about calling and give you a accurate count of turkeys in your hunting area. Calling does not spook birds, but too much activity will.
Do not walk thru your hunting area, in fact, it's probably best to simply call and listen from a distance the last week before the season. Calling after the season is also good practice.
Make sure you don't go to the same place every day to call the turkeys, especially on public ground. Your presence walking into and around the area may spook the birds. Go often enough to get your confidence up, but again, use common sense.
If you have a problem with calling prior to the season and you still believe the myth that calling spooks birds, maybe you should practice calling to turkeys where all your buddies are hunting."