I use a different propane fire but options are nice.
now in a CG, if I'm going to build a fire, in a fire ring, I use wood. (Alas, i do not do that so much since wife died)
But if I'm in a place where that might be a problem I have two choicoes. One is a "Pit-2-go" I got back in 2006 or 2007, this is a heavy duty steel box (Square shape) with a fire tray and grids for cooking also a spark arrestor screen (could be a bit bigger) you can set it up on a grassy space and it will not kill the grass (Tested it I did).
Option 2 is a propane fire.. Not the little red but an equivalent product.
I've used the Pit when I wanted a genuine wood fire for assorted things and the propane one when I need quick and again, no damage to the grass.