OK, looks like I will be following some of the advice on here and getting a Aiston 3X cycle rack to go on the back of the campervan for use when towing a small trailer (Erde 142).
The question is, are the arms in any way adjustable, can't remember where I read it but I thought somewhere suggested they were, so, are they? If so, in which direction?
I am pretty sure I will have to spin the bars to get the bikes on with the very straight back on the van but I am just wondering how well it will fit into the frame on my Fuel EX9.
Tried emailing but some of the posts also seemed to suggest the phone is a better way of making contact, and it is a bit late 
