I am actually using Vacationstogo.com and have a group set up with them. They take care of telling our guests when certain amounts for deposits are due. SHe has us all at teh same dining time and will take care of making sure we are all sat together. Everytime someone books she sends me an updated group list, so I have everyone information including room numbers and personal information that I will have to send to Carnival the month prior to pre-clear guests for boarding.