Make sure when you go, that you have enough copies of the information you want to pass on.
Then make sure you have free patterns for all printed out from the websites you choose.
Or perhaps a technique from a chosen website.
I would make up some samples of perhaps table runners or wall hangings using the techniques from the websites.
People like to see things as well as hear of new things.
I would also go to www.emblibrary.com
and download a free pattern, make it and show it IF you have an embroidery machine.
Do not display the free patterns to give away until the end of the program. Use your list of websites as an outline for your talk, showing something from the wesite as you go along.
You will do fine, but try to appear organized and be confident even if you don't feel like it. Hope this advice helps.