I for one appreciate your desire to, as a new turkey hunter, to approach the sport with the proper etiquette. I for one do not hunt from a truck, per say, as i don't consider that hunting, but I have pulled up to where the vehicle will be parked, and before stepping away hit the box call, struck up a bird, and proceede to fill a tag. A lot of large public properties have miles of access or two tracks meandering through them, and sometimes they are open to motorized equipment. I have a friend and prostaffer who uses a mountain bike for just such occurences, with great success, and I have obtained one for just that purpose. You would be suprised just how well you can outfit a bike, for turkey hunting.
Safety is always the #1 factor that should be on any hunters mind when afield, and if someone isn't in good physical shape, that could be a reason they are using a truck to cover acerage, also I believe one should always carry the cell phone, in every hunting situation.
I'm going to let some of the others chime in on the safety aspect of turkey hunting, especially on public ground,as thhere are many other aspects to be considered. Hope this has been of some value to you Axel and good luck!
GOOD LUCK, GOD BLESS, and STAY SAFE!