I cook a lot in my fireplace. I have a campfire grill that I use for steaks and chicken. It is a grate with angle iron legs that fold up. I just rake some coals under it and keep the fire burning small off to the side so I have more coals when I need them. I have also used a dutch oven off to the side or wrapped roasts and taters in tin foil and set them off to the side. Works great.
Backwoods Fatboy, 2 Ugly Drums, 22.5 wsm and 2 18.5 wsm's.