You can definitely tow with a Bobcat. Typically, it involves building some sort of hitch adaptor to attach either to the bucket or to the bobtach itself. I have never seen a factory built tow hitch for a skidsteer, but somebody may know of one.
Here is one example of what a member has built:
http://www.skidsteerforum.com/DesktopDefault.aspx?tabid=54&frmView=ShowPost&PostID=35154
Of course, this means that you will be towing in reverse, which may or may not suit your intent. Back about 25 years ago, I do remember one of our neighbours had a hitch on the rear of a John Deere skidsteer, and used to haul a fertilizer bin with it for augering fertilizer in to their corn planter. I am pretty sure that this setup was home-made too.