I don't think this would help @meeware's problem. IIRC, if something breaks with Dangit! and you need to fix it, you have to go EVA and select the part to repair. I'm pretty sure there's a setting to not have to go EVA, but if you're looking for that bit of realism then I understand not wanting to use something like that setting, Ship Manifest, or Part Commander. As a recommendation, you could put the bay doors on action groups or just leave them unlocked and open them manually as you mentioned.