They need time to themselves when they can relax and recoup from a busy day of serving your group. During the seminar, be sure your speaker has a place to go to sit, relax, and have a snack. If they have a book table, provide volunteers to man the table at all times and position the table in a choice location. Before the event, ask if they have a special needs you need to consider. Depending on the event publicity can range from announcing the event at your group meetings or in your group newsletter, to a complete publicity campaign through the local media.
Publicity needs to be ready well in advance.
Radio station event notices often need to be submitted several weeks in advance. By contacting your local paper, you may spur them to do an article about homeschooling in your town to coincide with your event. Prepare fliers and have your members place them on local or church bulletin boards. Make posters and ask libraries, local book or educational supply stores to post them. If there are a number of support groups in your area, contact them with information.