I recently purchased a new cooker for use in the van. A Jetboil half Gen that works off small LPG canisters but can also have an adapter hose attached to use larger 4.5 to 9 kilo bottles.

nice size for van life
adapter hose for larger bottles
comes with a frying pan
the sized bottles to use on a bench top

A lot easier to use to carry in and out of the van to cook on park benchtops. Review to follow.