Thanks for the tips guys. I think they will be great in hot climates. I can't see a small single skin canvas tent holding out long in damp northern Britain. It would be going on my LWB shogun so the impact on the fuel wouldn't be much but I think suspension wobble would be a problem - if you have to fit bonkers or whatever it defeats the point of a quick pitch tent.
Right I have decided I am not giving them another thought - too many drawbacks against just a few benefits. But, if it was an African safari in a 4x4 I was thinking about......?
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