Hi Gary,
Until about 8 seconds exposure, I dont need guiding with my 16" F4 dobsonian and that is enough for many objects: my home made 1 axis EQ table is good.
I bought a Tom Osypowski' 2 axis and guidable equatorial platform to allow longer exposures.
So, the imaging camera (ZWO asi 1600 color) is at the place of the eyepiece (I dont know the word) and connected to my PC by USB 3, the guiding camera (Altair 230) is connected to the ZWO by USB and I will connect the Astro Navis unit also to the PC in order to choice my object on a planetarium (Cartes du Ciel). Of course, I have still "to push to" the dobsonian.
But .... most of the time my observing sessions are not so long that I need that heavy system
.