best advice pay close attention to the weather and dress (or at least be prepared for any possibility) if you have not heard it yet there is a saying "if you don't like the weather in western new york wait 5 mins" it's a bit of an exageration but you get the idea... check weather.com zip code 14127 and see what the forecast is like. if you plan to be outside for 10 hours in november dress for the weather. a good idea is dress in layers (or bring extra layers) regulate your comfort by adding or subtracting layers..
the main lots will open 5 hours prior to the gametime and there will already be cars lined up at 8am to get in. some of the private lots around the stadium (there are various private yards and grass lots) some of them may open earlier