Our good Courier friend appears to be too civilized for an old fashioned oven and stovetop. He seems to require a fancy hi-tech campfire to cook all his vittles. But outside of Good Springs I haven't seen any and I'm at Novac now.
So tell me all the campfires you've found! Because this Gecko meat won't cook itself.
There is a campfire at the Powder Ganger West Camp, on the road to Primm. I think there's one at the Powder Ganger North Camp as well, across the road from the NCRCF.
I've only been as far as Primm, though, so there must be more.
ETA - found another campfire in Primm, at the end of the street with the houses on both sides at the south end of town. Also one in the Bison Steve Hotel in Primm, in the dining room on the bottom floor. Just look for the brahmin on a spit.