I cook on anything , do you mean in camper?? Swing out gas cooker ,keeps smells of curries etc etc out of van well most :, barbeee gas rock portable outside or fire if anyone or i have one. Love it.
single ring butane cooker in a case but only for bacon sarnies. but i have meths trangia stove as well (if the gas runs out) and for emergencies or when on a walk i knocked up a coke can penny stove.
gas inside if awning not up gas outside if awning is up bbq if nice outside but you forgot to put MICROWAVE yep i take a microwave and if on hook up it's my friend PING!
A 2 burner hob and grill by Gilet on a removable unit. Not a bad item. Grills a bit rubbish and the wind breaks are pointless and need modifying. Would also be now if it had a lid clamp. At tw moment I've had to use 2 small bungee straps to stop it rattling.
Gas hob in van. Bit tricky now I replaced the window and didn't check I could open the slats with the cooker hood up : Must sort that out at some point...
I use the two ring + grill unit that Viking installed if we're camping. On days out I keep the gas bottles in the garage and use an itty-bitty cheapo portable stove instead.
Definately don't use the Coleman inside. Pressurised petrol = trouble. I did manage to cook on it at the weekend during the storm, on a table next to the van. Worked well ;D