I to am a "Charcoal Man" but this is not very practical when caravaning. This year at the NEC Show I went gas!. Bought a "European Outdoor Chef", superb bit of kit though it does come at a cost. Constuction is very strong (Made in Switzerland), not a bit like a Cadac. It has piezo ignition, can be used open or covered, has has ability to roast joints or complete chickens etc. and the smokey flavour is given as juices/fat drips onto cones which can also be inverted, underneath there is a drip kettle into which excess juices/fat are caught. Draw back is it's a bit bulky but I carry it in the back of the car and just add the leg extensions when we pitch up.
All in all excellent, but does come at a cost, expect to pay in excess of