On the carri chef, the one pictured at towsure is the 2008 model, it has huge holes in the lid and I can't see how you could get a decent roasting temperature. You want the 2009 model which looks like this :/QUOTE]
I have the pre 2009 model holes holes in the roasting lid and it still get way hot enough to roast. For a chicken, veg and tatty's to feed 4 you need 10mins of pre heating at full heat with lid on, followed by 2.5 hrs at medium heat with the food in situ. No probs with older model.... Roasts great. Also very good for cooking part baked rolls which keep stored for ages.
I appreciate a roast dinner might not be on the normal menu for overlanders but seeing the envy in other campers is well worth the effort.
P.s. The cool camping cook book has some great camp food ideas and is an inspiration, especially if you are the lazy type and live off Ration packs...lol.