I was thinking it would be a cool idea if you made a stacker trailer for snowmobiles. Still considering it. Downsides that the top sleds might leak onto the bottom and the stacker platform might not be wide enough for two sleds. MORE ROOM FOR ACTIVITIES! 
Pros;
Lots of room to sleep and store stuff.
Shorter trailer.
Cons;
Expensive
limited head room under lift
High centre of gravity
Pros;
Lots of room to sleep and store stuff.
Shorter trailer.
Cons;
Expensive
limited head room under lift
High centre of gravity
