The Board for Certification of Genealogists has created a new page of upcoming events at http://bcgcertification.org/calendar.html. You will be able use this webpage as a reference for learning where a certification seminar will be held or where the BCG booth with the portfolios that travel with the booth will be accessible.
Please note that most conferences allow (and even encourage!) the public to visit a conference vendor hall with no admittance fee. If a conference is held within driving distance, you may want to consider planning a trip there. Visit the sponsoring organizations' websites for more details about their conferences.