The one thing that is nice about the roll-up kind is you can pack them in everytime you go in the woods. The bad thing is they are pretty much disposable - I almost ripped thru one with the strap last year and I don't think it will last thru another half-mile drag.

One of the kid sleds will outlast the roll-up, you just have to find a good place to hide it or leave it in the truck until you need it.