I haven't been sledding in years. I used to love careening down a hill and flying through the air over a frozen stream. Now that I'm older, I'm not so adventurous. I do like building snowmen though.
Sled, no. Truck inner tube, great!
Sleds can have their blades his hidden tree limbs and send you flying. Inner-tubes glide over obstacles like that.
If you can get them, they are great in the ocean as well.