For me the effort was minimal, just the burden of pulling the AE card out of my wallet.
It all hinges on clearance - where your tank and regulator are located, and the access door. I would recommend taking the Van to someone in your area that can provide some insight. If I recall correctly, there is criteria associated with installation & relocating the tank regulator - Safety regulations that should be observed. I'm sure you'd be able to do it yourself after all this has been outlined.