The normal BAW hitch is great but you need to remove your right side Wideloader when you use the trailer. Since you would have so much carrying capacity on the trailer, removing the Wideloader would not hurt. My problem is I have the Xtracyle Kickback kickstand which is a terrible design as it requires me to fuss to add or remove the Wideloader. I repeat 'a terrible design'.
Most of the time I don't need the trailer but I do need the wideloader so I leave the right side wideloader on -the left one makes it hard to walk my bike without wacking my leg.