Welcome to alli! It's a great plan and I'm sure you'll do well. Try to take a look at some of the other posts when you have time and you'll see how others have done.
Part of the alli Program is that people learn how to make better choices whenever they are in any situation. So whether it's weddings, vacations or holidays there are always foods to include, and foods to avoid and eat in smaller amounts. That not only helps to lose weight but to maintain that loss once goal weight is reached.
My recommendation is to make a few menu plans before you go away so you can still take the capsules and enjoy the weekend. Planning to overeat is dangerous because it may begin to set a pattern to make changes only when it's convenient and, most importantly, it's likely to undo all the weight loss that's been achieved.
In the next few weeks you'll know the program and the food choices better. It's always a challenge to learn a new skill and then it becomes second nature after a while.
If you decide otherwise keep in mind that it can take 24 to 48 hours to avoid the risk of TE's after the last capsule. It depends on the rate of the digestive tract -- and that varies with each person.
I hope this helps. Please let me know if you need anything else.
Pat Baird, MA, RD, registered dietitian