Flintlock safety

[Mr. 16 gauge]

I eventually would like to take my trade musket turkey hunting (and other forms of hunting as well). One of the problems is that we usually hunt small patches of ground, get in the car, and then drive to another....maybe hunting 4-5 different spots in the course of a day.
I would like to be able to dump the powder from the pan in my flintlock and then just take the gun and case it and go to the next spot. I have heard that some guys put quills in the touch hole, and others put a leather covering over the frizzen.....both seem to make sense to me. Is there any danger of the gun discharging accidently if both these techniques are followed? I had to run through 4-5 rounds of nickle plated shot or econoshot or bismuth just because I discharged the gun to move to another spot.
Thanks in advance................