In view of he above......
comments, both my own and those after me, I decided to investigate this query in more detail.
The RAC offer decent advice as do a number of Caravan towing associations. In brief, they advise the driver should "Slow" as slowly as possible until the snaking effect disappears. However,"Do not Brake".
My advice was given many years ago whilst atending the "Fleet Show" at Silverstone, where in fact we were given a practical demonstration of a Volvo towing a caravan.
"butter and salt used to be bad for you" - Advice changes. I hope nobody crashed because mine was crap !
Buy it & Use it, then sell it and buy something bigger