black powder shotgun ordered...

[Rustywreck]

Saturday I ordered a black powder 12ga double barrel shotgun - should be receiving it Friday.
My hope is to take it turkey hunting in late Arpil. I've done some reading on making a load for this type of gun, but what I'm not finding a good solution to is what to use for wading between the powder and the shot, and what to use on top of the shot.
I would appreciate any advice regarding wads, quantity of powder, shot, etc.
I'm not new to muzzleloaders in general, but I am new to shotguns.
thanks.