I generally put mine at roughly 30psi for usually 3 days, I always check on day 2, but it's usually still low, day 3 it's always good. If you are going to be leaving it for a week and a half, I would probably set it at serving pressure or just slightly above. If you over carb you can anyways just bleed it off. The only issue I see with trying to use both is that you generally want to force carb when the beer is cold, and when you use priming sugar, the yeast needs to be at the correct temp (warm) for conditioning. Good luck, hope this helps.
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