Take a small charcoal grill grate (small Weber or whatever) with whatever charcoal you think you need if you're floatin' alone. And some fluid. Screw the stove. Use your hands to scoop out a spot on the gravel bar. Line it with bigger rocks to sit the grate on then go to town with supper. Hell, just cook some beans in the can over the fire. Add firewood you've gathered on it after dinner. Some people wanna get fancy, other's just wanna get something in their gut and enjoy the experience. Best bologna sandwich's I've ever had have been on a gravel bar.