I also have a Surface Pro (bought last year) that I use scope-side inside a plastic tote, like many others do. The tote keeps the keyboard from being exposed to the sky, which helps to prevent dew/frost. The tote has a hinged lid with gasket, so I can close it up once everything is running. As well, I put in a little 50W heated pad inside, attached to velcro strips, to add some heat and have a warm surface to rest the Surface Pro and my cold hands on. Plus a little motion activated light with red tape over it, to give me some light when I need it. I've been out in near-zero degree F with no problems, no dew or frost, and I've seen no degradation in battery performance on the Surface Pro. For extra protection, in case the tote tumbled over, I have the Surface Pro in a protective case and use a right-angle USB cable adapter to prevent too much torque on the computer's USB-3 connector from the cable (not shown in the picture though).
The only thing I noticed is that the cold temps can be rough on cables and strain reliefs, as I'm just noticing the strain relief breaking on my Surface Pro power supply. On my patio, I'm running off 120VAC, but I do have a couple Celestron Powertank Lithium (LiFePo) batteries (one small and one large) that can get me a night's worth of imaging. With so many 12V accessories, I'll likely be switching over to some kind of dedicated 12V power management for both AC and battery as the source. But that brings me to another point about the Surface Pro, compared to traditional laptops; it takes 12VDC already and you can get a cord like this to connect to any of your power management systems (or external batteries) very conveniently.
I've admired the computer-on-scope setups that people have put together, as well as things like the PLL Eagle, but I feel like I still want a display, keyboard and mouse right out at the scope, ready to go at all times. As I get more into automation, that might change, but for now I like having the Surface Pro out there. And for visual use with friends/family especially, there is the ExploreStars app that runs well with the Surface Pro wireless (WiFi to the PMC-Eight mount) in 'tablet' mode, using the touch screen to control things.
Edited by jrsone, 13 February 2019 - 10:51 AM.