Deloitte's summer program

I am a rising accounting senior, and I was chosen to attend Deloitte’s summer program and it’s coming up soon. I was deciding on what outfit I should wear (business casual style), and if anyone has previously attended Deloitte’s summer program, could you please provide me with some insights about the program? When I return to school in the fall, what are my chances of being selected for an internship interview?thank you very much!

Assume business- not business casual- until you have direct information to the contrary. There is some variation between offices, but Deloitte as a whole is on the more formal side. Safer to start too formal and go down than the other way around!

Again, different offices, different things, but my D had an interview just before she finished for the summer. The program has a reputation for being well run- but again, each office is independent, so it can vary considerably.