Good morning Grant,
My CCD and DSLR-Mount-Guide camera are all controlled via USB through the one cable.
I have a Startech 4 port, powered USB hub which all the cables on that side of things are plugged into, on my Losmandy G11. I then have a Mutech USB Repeater Extension cable leading from this into the Whirlpool control-room. This cable is gold plated. I have the cable plugging into another Startech Powered hub.
I have never had any issues.
HTH.