You don't have to recall safe everything else to make that work.
Just scope ONLY the single aux master you want in the snapshot, and only select Fader.
In the snapshot scope,
- double click the 'none' button next to the fader strips, to select NO strips of any type.
- click the aux masters you wish to scope (both left and right if it's a stereo pair).
- select "fader" in the scope section.
This will recall ONLY the fader level of that single fader that you've scoped when you hit this snapshot.
I attached a screenshot of what it should look like.