Demountable camper group

Towing a horse trailer with a Tischer 200 Box on a Mitsubishi L200.
We got a 100mm extension from a towbar specialist company but with the horse trailer, there was no ability to extend the drawbar ( Ivor Williams said No way and insurance would be another issue). We marked the trailer so I knew that if I turned any tighter, the trailer could make contact with the back of the camper. In the end we swapped the double cab ( sadly) for a rather agricultural 1 1/2 cab which makes the weight distribution better and the turning circle much improved. Now we have used this combination for quite a few thousand miles and the ponies also seem happy to travel.

No, Ifor wouldn't be possible to extend, I looked at towing our earlier 505R and couldn't make it work,
the extended towbar while substantial didn't look right to me.
A king cab does offer very best weight dist' as you say, and you are fortunate to find one actually, pretty scarce in UK