I used a Whisky Jack Outdoor Co. Freight Toboggan to cross Algonquin Provincial Park, over 10 days and 165k from February 2nd to the 11th, 2018.  They were tough, I mean super tough.  We had skis on and had to watch the toboggans slam in to 300 year old Yellow Birch trees at 30 km/h with a full load, square on!  Every time, they bounced off unscathed, with our load completely secured with their very efficient tank system.  The top tank allowed us to easily get to our day use things like food, axe and spare clothes.  I would buy another one, but I know I won’t have to because these things won’t wear out.  I recommend keeping these things in control as much as possible, but if they get loose on you, worry not, they’ll survive anything.  If you’re going out on a winter trek and need a toboggan system, look no further.