I had been to Shaeffer many times even with the metal bleacher seats in the middle of winter.
I still haven't been to Gillette. I have been offered tickets. I've either been out of town or the game is against a terrible opponent with heavy downpours or sub-freezing weather expected. For $200 a pop.
Someday.
One good thing about those bleacher seats was that you could get warm from everyone huddling together vs. being separated by an armrest. Of course there were always 1-2 too many people in a row or a really fat dude....but it was nice and warm when you sat back down and pushed aside two people (yes, I was a fat dude).