Steve- perhaps next time we could also just meet at the prison- there is a very handy (and not too expensive) pay lot across the street, and some rather interesting pubs/restaurants in the same block.
I'll also second Jim's comment about scanning the place first with another smaller camera before bringing in the 8x10. Eastern State is a very large building, and the choices for shooting are overwhelming. I would also recommend, whatever format you're shooting, to bring a faster rather than slower film, as some areas are quite dark, and Jim and Joe were getting 5-10 minute exposure times for some of their shots.
Eastern State is also a perfect place for semi-stand development of your film. You have either extremes of contrast, with little mid-tone, or very low native contrast, compensating for both of which semi-stand is good.