We've got an extinguisher mounted on the side of the kitchen, underneath the fold-down bench extension. If hell breaks loose on top of the bench, you should still be able to reach under and grab the extinguisher, with your hand shielded by the bench itself. It's always there, which I like, because it doesn't rely on me needing to set it up or pack it away (Goodness knows I'd forget).
When we picked our camper up JT recommended getting another two, and mounting one on the off-side mudguard (same spot as cracka's), and also one inside the tent. He reasoned that canvas is flammable, and you wouldn't want to be inside the tent and have the tent catch alight. I've been meaning to mount one in the walkway area of the extenda - particularly important now that all my electrics live up the end of the walkway.
Thanks for the reminder - this has been on my to-do list for a while.
UTE - great tip about the beer can - I'll have to remember that. I may have found a use for VB!
Thanks!
Matto