Here are the other things that need to be checked and fixed.
Extend the tow bars as if to connect them to the Toad. now move them up/down and side to side, do yo feel any clunking or hear and banging when yo do this? If so you need to fix this. One way is to add a Quiet Hitch to the Tow Bar. This movement or rattling you get will be transmitted to the Toad in the form a harmonic movement and contribute to rapid movement side to side of the Toad (Death Wobble). This harmonic can only be stopped by coming to a complete stop (Death Wobble). This all starts at the rear axel of the MH and works its way to the Toad and the Toad attempts to correct this but cannot. this is normally seen in Toads with an EPS (Electronic Power Steering) Mainly because you shut down power to it when you shut the Toad off.
Doing the things that I have said will normally keep you out of trouble unless your Toad has a screwed up front end.
I haven't had any issues due to making sure I have taken care all of these things.

Good luck and may the Wobble Not be with you.