I went with the tractor hydraulics for a few reasons.
I didn't want to hook up/line up anything more down there than I had to even if its not that hard, easy etc.. just didn't want to do it. I felt it was better to just use the existing system for cooling etc. even though there is nothing wrong with a seperate PTO driven system. The biggest reason is that I could use the remote for other things besides the BH. If I had gone the PTO route I would have had to spend extra dollars to install a remote to run the HTL, dump trailer, etc..