I would disclose it. Disclosing it is the right thing to do and would give me a stronger position when negotiating, along the lines of: "If the offer isn't comp

I would disclose it. Disclosing it is the right thing to do and would give me a stronger position when negotiating, along the lines of: "If the offer isn't compelling enough, I'll just walk over to this thing that I have going on here..." Ideally, I would be able to plan ahead for time off and stick with (pre)allocated (un)paid amounts, all within reason. Especially if I actually have employees who can communicate with clients, attend meetings etc.