Because these type of vehicle will generally require the awning fitted to the rear door you need to ensure there is sufficient clearance to allow the door to open. Especially side opening doors as they tend to kick upwards when open. Therefore the main awning should be higher than the tunnel roof.

Also the rear profile of these vehicles will generally have a sloped shape. The awning should therefore have a long tunnel to allow max overlap.

Outdoor Revolution Movelite and Navigator also has an elasticated gusset to help get a good fit. Another recomended awning is the Trigano Biviouc Car at only £80