Side dinette bunk - want one fitting

I can't help you specifically but it will depend on the construction of the caravan as to whether the wall is reinforced sufficiently to take the extra weight of both bunk and person in it.

What I can tell you is that it will take between more than15kg OFF your available payload. I know this as I have taken a bunk out of my Lunar. It weighed just over 15kg.

I very much dought that you will be able the retrofit a bunk bed to your caravan as the body sides of each model ,will have weight bearing strengthening pieces in the wall panels where needed when constructed, if you do a search on the  Bailey website it shows how alutec panel are put together

I would think a free standing  bunk bed would be an option