In some cases we can come to you however depending on the vehicle and if tailoring of the custom made awning side sheets is necessary then this is a factory fit only option at our base in Dorset. For surveying the vehicle we have technical information and templates on all panel vans, most motorhomes & trailers so there is no need to survey. Other vehicles can be perhaps be surveyed. A detailed measuring sheet is available on request. Our wind out Anexe van awning takes up less space in the vehicle when travelling than an ezi-up type canopy systems do. The Anexe Roof closes any gap between the van and your shelter as it install directly to the van roof. With an instant shelter tent there remains a gap between tent and van where water can come into the sliding door etc. Although the build is light weight often 2 people are require to open these gazebo systems.