Carol,
Yes,it is frustrating when so many conferences are cost prohibitive due to the travel and time involved. A great perk of membership to many organizations is the ability to access video archives of guest speakers and demonstrations of new technology. If the organization you belong to now does not do this currently, you may want to send your local chapter President an email and suggest a password protected area on the organizations website where videos can be accessed by current members.
Wishing you continued success in the classroom.
Theresa Schmitt