I build it for my 1977 Honda PC 800 based on an old luggage trailer for car. Then I used it again with my 2007 BMW K1200LT. I built too the hitch for the Kawa and modified the trailer to stay in the french laws about it.
If the PC800 missed of punch, the V1 is enough powered even if we are together with pillion and all full luggages. The french law specifys that the trailer doesn't exceed 80 kgs (176 pounds). Mine is 25 kgs (55 pounds) empty, so the useful charge permise a tent camping seats, inflatable mattress, light, extension cable and others. Bike luggages are full of clothes. That permise you to have an excellent stability because you have not too much weight high placed on your bike.
On the road you have just not to forget it's behind you. Braking distances of course are a bit longer but the manoeuvrability is excellent. Last four days I ride in the western alps (Vercors) and Lyon mountains with no any problem but the gravels as usual. I know that's not a racing horse and carriage but when you need power the V is there.
So for you, big traveller with permanent pillion I think it's a solution.