I was finding that I needed more flexibility to add other events and to slightly tweak Shed event times.
Below is a link to info on one way you can export your calendar information from Shed and customize it to your specific needs. Furthermore, free online apps like Google Calendar, CalendarHub, and 30 Boxes offer reminders via text message (SMS).
Looking forward to seeing you at the con or over the interwebs,
Freelance Information Specialist