Congrats on finding the cure. We use the same cure and do it with the valet key when towing (valet key has less lock access). We keep the regular key in the RV for when it is time to unload the car.
At any long stop when the car is not unloaded, we remove the valet key from the toad and lock the car doors - just to keep honest people honest - and put the valet key in a conspicuous spot by the RV's driver seat to prevent forgetting when we resume travel.
The VSC (Vehicle Stability Control) light is probably on because 2 tires were turning at a very different speed than the other 2. It should clear after driving a short distance.
We sometimes get an ABS (anti-lock brake system) light when coming off the dolly too - probably similar reason. It always clears after a short drive.
Safe EZE travels