Danny,
"I think the 2 wheeler is easier over bumpy terrain." That's what I was thinking too. As far as the price, yeah I think they are too high as well, but my son says I say that about everything :)
Wayne,
Thanks for the links, I was wondering about that type (dumping poly) glad to know it works as advertised.
Dennis,
Yes, it was your post about how much you liked your 4 wheeler that got me thinking about them. I was concerned about only being able to pull it. I'm thinking your right I may need both.