Volcano stove. Burns wood, charcoal, or gas. when it is in the stowage configuration is it about 8 inches tall and as round as a large pizza pan. It fits in a lot of places... can be used as a grill or as an oven with a dutch oven. Covers a lot of bases. love mine.
http://www.volcanogrills.com/
[video=youtube;1qSg-QzZINs]https://www.youtube.com/watch?feature=player_embedded&v=1qSg-QzZINs[/video]
I've used mine quite a bit. But its the dirtiest thing to have to pack and transport.
If you have the space, we really liked our Cobb grill, you could basically put a couple pieces of wood or charcoal in the bottom and cook for hours. They have a bunch of accessories that all pack down into the same carrying case. Its not super tiny though like the slat grills. I think it comes down to how much you think you are going to use it.
http://www.cobbgrillamerica.com
I don't think you can still get the Cobb in the US.
Something happened to the US distributor for Cobb a few years back and their products were unavailable here for a time but they're now back. Check Amazon.
I've had the basic grill for several years and picked up most of the accessories at fire sale pricing when the distributor closed out. It's not my first choice for steaks or burgers but is excellent for roasts, beer can chicken, stir fry, seafood, baking and most breakfast entre's. It only takes 6-7 cocoshell briquettes for a pork tenderloin, foil packets of onions & potatoes and corn on the cob. Very miserly with the charcoal.
Everything fits into a nylon case roughly fifteen inches in diameter and twenty inches high which is actually pretty compact considering all the accessories (griddle, frying pan, wok, roasting rack, chicken stand).