I can't speak to the strength of the mount, however, things to consider on your application is how much weight you will add and if you will be stuck with the trailer. It is generally considered best to error on the side of caution and go with the larger size. Even though the small winch should do you well if you are equipped for a double line pull for tough situations. Another idea would be to use a receiver hitch mount. You said you had one front of car and back of trailer. Often it is very desirable to pull out backwards. You could store it in the camper when not in use.
Hope this helps. Safe travels.
Hope this helps. Safe travels.
