If yourself or a colleague has already taken a group to the country of your destination, show any relevant material. All tour leaders should be present. Visual contact is very important. It might be a very good idea to schedule a second informational meeting, especially if enrollment is sluggish. Students might just need to be reminded of the existence of your program.
Nothing is better than an informational meeting.
Contact all students present at the first meeting. Repeat the 1st informational meeting procedures. You should be able by that time to be more specific on the program cost and itinerary. Discuss cultural differences, safety issues, conduct while abroad and any relevant issues. It might be a good idea to present and discuss cultural differences.