Heres's my (trans)portable setup. The FSQ-85ED with an SS-One Traveler harmonic drive-based mount. The SS-One is made by a chap called Nakazawa-san and he makes many small unique stuff.
The Raspberry Pi based AutoGuider Pro controller (which he makes not only for his Traveler mount, but also for other makers), is a pretty nifty device. Not only does it perform autoguiding, it controls focusing, DSLR intervalometer control, dithering, GOTO, and Polar Alignment. With it's USB ports, it accepts WiFi and GPS devices. The WiFi USB, there's remote VNC display, and Sky Safari Pro control for a more extensive GOTO.
So there's really no more need for a PC/Laptop with this setup. It does need 12V which I use the OmniCharge Ultimate to power the mount.
A little video snippet of the Autoguiding calibration in action :-
https://youtu.be/v6-zXrae7eI