I have the Ioptron CEM70G which provides USB3 and lots of power outputs on the saddle - so all you need is a small form factor PC - no powerbox needed. (although if I was doing remote imaging I would get one to allow the USB ports to be powered off and on)
I run ethernet to it so I image inside the house. If I had to sit outside with a laptop, I would have given up the hobby a long time ago
