I added a section to our fire pit that's specially designed just for grilling. Instead of rock, it's made of bricks so it can have a nice level top, just the right size to hold a grill. It's also shallower than the main fire pit, to get the grill closer to the coals.

It's really nice because now we'll be able to have a proper fire you can see by and stay warm next to, but also have good smoldering coals for grilling over. You just shovel back and forth between them as need be. That's why I keep a flat shovel next to the fire pit.