We have a U-shaped dinette in the camper. The table is supported by a single leg. I was thinking of attaching a vertical support to the front of the rear bench. I would then attach a horizontal piece that protruded towards the middle ofthe dinette with the table mounted on top. There are ony two of us and the table is only 24" square.
I should mention that the wobble in my table is coming from the base itself. The support tube fits snugly, but when I move the table, I can clearly see the base deforming and allowing the table to move.