My questions are:

Would you really be able to forget about the emails or are you going to stress out about the emails over your vacations?

You think you want to skip it now but the day after your scheduled appointment will you regret not seeing T?

Could you talk to him either before or T least at the beginning of the appointment about keeping it lighter so as to not stir up to much right before your vacation. I have told Ts this before breaks or holidays and they are agreeable. So we keep it lighter.

I know, for me, I would regret cancelling and it would negatively effect my vacation.