Unfortunate that DMC doesn't still make the adapter I got from him when I put a Ural on my '78 80/7 BMW. It set the forks out about 3 inches and made the steering very light. On handed in side winds and I had to take the steering damper off. No shake or tank slapping of the handle bars. Controlling the effect of road crown was a one handed input.
Earles style forks may be available from some maker.
Yup the 70 hp of the Wee does make getting the rig easy. I even had adequate power pulling a Kwik Kamp tent trailer.
Power to weight ratio, the bike pulled the trailer more easily that my Isuzu Trooper. 750 lb/ 70 hp to 4500 lb/125 hp.
Our local sidecar guru, Doug Bingham, has passed away. Check that maybe EML may be a source.
Have fun, we sure did for 10's of thousands of miles.