Hi Mike,having done the same thing years ago with my son,let's hope the weather is half decent for you. As Ron said above ,we went to the strip district for Steelers tidbits. The thing I loved doing with my son,we got in on a Friday,was walking around the city. Feeling the hype. On Saturday we walked over the bridge(we stayed downtown at the William Penn) walking along the river promenade,circling Heinz field taking in the history. As a life long fan ,it was almost surreal. Being a big Pirates fan as well,I could not believe our luck,as the big doors were open to the field. We walked right in and were right on field level looking around at all the seats,the scoreboard. Too cool!
Like I said,hopefully you can get there a day or two early. Take your time walk around. Get out of the hotel for breakfast and lunch.The city was far more beautiful than I had anticipated as well. Have a great time and take lots of pictures! I am jealous.