The answer depends on many factors: whether you are planning FUE or strip, how many grafts you might need, where they might be placed, whether your doctor favours shaving the recipient area, etc. There are many posts on the forum about the options.
Telling people you're having an HT procedure definitely makes many things easier, but don't underestimate the consequences of being "HT guy".
For my part, I went back at three weeks and posted my experience here:
http://hair-restoration-info.c...=344104471#344104471
Good luck.