I take a new small canister for the Pocket Rocket when I'm going into the hills and use them up when I have a fixed camp or a picnic with the car near at hand.
Suitcase single burner, camping gaz party grill and a barbeque.
Kettle on the single burner, bacon on the party grill, almost everything else on the barby (except rice / pasta dishes in which case the rice or pasta gets done on teh party grill).
Likely to swap the party grill for a cadac though - so will drop the barby and just take a cadac and single burner.