chaughwo

I just got admitted to my top choice and they have invited me to attend an open house in 2 weeks. What is the typical dress codes at these type of events? Should I go in a suit and tie, or a polo and khakis, or are jeans and a t-shirt fine? Also, does the school typically pay my expenses associated with attending or do I cover that myself (there was no specific mention in the announcement email)? I apologize in advance if these questions seem a bit naive, but this is all new to me. Thanks, chaughwo