What I would do here is to split out the clip you want to AS then drag it down into an otherwise empty track. Do your work on it, bounce it down, then drag it back.
Yes, it is also what I do, but I so often forget to do it, especially when working with layers, I do get confused quite easilly.
It would be so much easier and better if it was possible to activate audiosnap only on the selected clip. Maybe they will develop that sometime. Thanks for your advice.
I use an unaffected recording (i.e. I monitor the guitar going through whatever patch I'll eventually use but I record the basic (clean) output of my guitar), I then use AS (if required) and then put it through Pod Farm. I wouldn't use AS on a finished recording. If you keep things sensible there is no indication of any messing about with the timing but, like I said, I wouldn't do it on a "dirty" recording.
Yes, I do only edit the dry signal. I do not have any "timing" problem when using audiosnap. It quantises pretty much as I need most times.
What I mentioned was a slight audio deterioration when bouncing to clip of the quantised part, regardless of which radius bounce option I choose.
I can most time notice a difference between the quantised track and the original version. 90% of the time it is so slight it is perfectly usable, but in some instances I found it to affect the tone too much and re-recorded the part.