I got married this past October. It was out-of-state from my program, so I did end up missing 1 week of class (first year in a PhD program). I told all the profs at the beginning of the semester and no one had a problem with it. I knew it was coming, so I was able to work to stay on-top of things.
Honeymoon is on hold momentarily - we're taking one for 2 weeks this May after classes end because I did not want to take more time off.
The planning, etc. is daunting, but doable.I was lucky and didn't have classes on Monday, so we still had a period of Sunday-Monday after a Saturday wedding to spend time together and absorb everything.
The planning, etc. is daunting, but doable. I agreed to the fall date because I wasn't "in" grad school yet (hadn't been admitted) and didn't know what would happen. Frankly, I assumed I wouldn't get in. The world is funny.
Also, congratulations.