…Gas.
Here is a very nice “camp stove” that can run on butane cartridge canisters (yes, lying down, but just so) OR, with the adapter, propane.
With the cartridge in place:
It’s very nice, very well-behaved device. It works great with the butane cans, and is fine with the propane. It behaves just like a regular gas burner (aside from the level control working ‘backwards’). No doubt it’d be a great (vehicle) camping stove. As an “oh crap, grid down” device it’s just as great. While other “camp stoves” feel like camp stoves, this feels that bit more… civilized. The brand doesn’t matter. There are many. They are likely all made in the same plant, with different labels affixed. Such have nice “carrying cases” such that they can be set aside without issue (just keep the fuel separate!). IMO, this is THE way to use the butane cartridge style canisters, FWIW.