15th... its the 15th... last day is the 15th and you definitely want to reg while you can...
What time on the 15th does registration end? Should I be worried about the attendance cap?
I don't know about online, but I assume midnight. For mail-ins, it just needs a postmark by then. But, if you plan to mail-in on the last day, please choose Will Call.
And as for the cap, let's just say I would very strongly reccomend that you pre-register. Also, at-doors get paper badges.