Converting from traditional aluminum siding to smooth skins?

You can't post links *TO* photobucket but you should be able to embed images from photobucket.

Go display your photobucket image, right click on it and select "copy image location" then come back here and paste that image location between a set of image tags.

BTW, your camper shouldn't be flexing that much. If it is that means your truck is flexing that much too, and you've buckled every body panel on it.