I own a T2i and I don’t think what you have planned will be very effective. MAYBE if you had 2 or 4 of those cameras with individual operators spread around the field it might work.
First of all HD DSLRs are not great cameras for documenting extended events – as in capture everything that happens over the next hour – that’s not what they are designed to do. I would worry about overheating and the SD card running into buffering issues – not to mention every 12 minutes at the minimum you have to start a new clip.
A T3i would be great for a sports team profile, interviews, certainly some shots of the action taken relatively close. From the press box you are going to get a rather boring shot with not a lot of variety (all your shots will be from above and from relatively the same angle) whereas if you are down on the field you can get more interesting shots closer up but not see the overview of the game. A better camera choice would be a camcorder with a long lens and extended zoom, a very stable tripod and some way to feed in the play by play although that can be recorded separately.
Steve Crow
Crow Digital Media
http://www.CrowDigitalMedia.com