I'm another with the Q (& a Q-S1) though they are far from my main systems.
This is the section where I expected to find them - they are certainly compact and aren't SLRs, but I half expected them to be lost in posts about Pentax Optio point & shoots (I've never bought one of these but have still ended up with a couple, as yet unused by me).
I'd find the location of Auto 110 posts more difficult to predict. It's a Pentax SLr, a Pentax compact & a film camera. I'm unlikely to ever get a 110 film to try in mine, but if I did film photography section would seem at least as appropriate as either of the Pentax sections.
I still have some Pentax film SLRs, again film photography is likely to be where I'd discuss them.
The lenses of my auto110 have been used on both MFT & e-mount so the adapted lens talk section is where I'm most likely to post about them. My little Q models will also frequently be used for adapting - so far I remember using M42, PK, c-mount, d-mount & panteka lenses on the Q but there could easily have been many other mounts.
I don't have a K-01, and don't think there is a section where it truly fits, Pentax SLR seems as good as anywhere for it. I don't think any of these are really mainstream enough to warrant their own sections.