Orientation is long and boring. Wear comfortable but nice looking clothes.
You probably won't get a schedule of events beyond show up in storey hall by 9 am on these two days . . . I don't remember orentation all that well. I do remember it was in Karcher Auditorium and we were all in rows of ten (2 rows for each legal writing section). I remember the dean giving a long speech that he didn't finish, some information about filing an declaration of intent to study law (and to take the bar exam) before october.
I wouldn't buy books yet because then you will try to start doing crazy stuff like reading ahead.
If you have the self restraint, go pick out used books from Varsity Bookstore (on hillcrest, not the SMU bookstore, Varsity's prices will probably be lower).
Oh, and there will probably be an event at Dave and Busters to socialize with your new classmates one evening after orientation. Some of the professors will give info about what you should expect . . . one professor will go through how to brief a case with you . . .that's all that I remember right off the bat. Oh, and they will also give you westlaw and lexis nexis passwords, etc., even though you don't have full access until october 1st, because some teachers use westlaw for their course webpages. Someone from the library will give a presentation about the services that it offers.