I have ridden sidecars, in the rain, in the sun, up motorways and down dirt tracks, Panther, BSA, Norton, Vincent, to name a few. Turning left is a skill best learned at low speed! Turning right is easy provided the steady bar doesn't let go on you! It happened to me once, finished up in the hedge with surpisingly little damage.
Fiddle brake on the sidecar wheel makes left turns easier, but then not many sidecars were fitted with them, or any brake at all.
I will tell the tale of my home made sidecar heater off the exhaust one day!
Geoff