Time travellers have been here before

MIT students are holding a Time Traveler Convention next Saturday in the hope that some visitors from the future might show up.

Great idea! I'd love to help! What should I do?
Write details of the time traveller convention with dates on a piece of acid-free paper, and slip into obscure books in academic libraries where they can be found in the distant future! Carve them into a clay tablet! If you write for a newspaper, insert a few details about the convention! Tell your friends, so that word of the convention will be preserved in our oral history! A note: Time travel is a hard problem, and it may not be invented until long after MIT has faded into oblivion. Thus, we ask that you include the latitude/longitude information when you publicize the convention.
You can also make an absolute commitment to publicize the convention afterwards. In that case, bring a time capsule or whatever it may be to the party, and then bury it afterwards.
Can't the time travelers just hear about it from the attendees, and travel back in time to attend?
Yes, they can! In fact, we think this will happen, and the small number of adventurous time travelers who do attend will go back to their 'home times' and tell all their friends to come, causing the convention to become a Woodstock-like event that defines humanity forever.