The best would be to send us the photo of your sofa and we will come back with the advise.
There are 2 potential problems with caravan sofas as they might be firmly attached to the wall and to the floor:
1) There are elastic straps attached to the cover and need to go under the sofa in order to keep it in place. It might be not possible to secure the covers to the sofa without using the straps underneath the sofa. The fabric won’t fit snugly.
2) Our covers come in one piece and they are designed to cover the entire sofa including the back. It might not be possible to install the cover properly if there is no space between the sofa back and the wall.