Can a bachelor or bachelorette party be too celebratory? Yes, if it affects the necessary activities of the next day. A couple things to remember:

  1. Do not, under any circumstances, schedule these parties on the night before the wedding. Ever.
  2. Make sure to hold these parties on a night where the next morning is completely free to recover.
  3. Don't let movies like "The Hangover" make you think that all pre-wedding festivities have to go to extremes. Mellow can sometimes make for the best memories (particularly since you are more likely to actually remember).