Have to disagree on this one. A tournament being a freeroll doesn't affect how you should play your pocket pair.
What if OP is comfortable with 88s, should he shove 88s every time he/she gets them? Too many factors to consider: position, stack size, previous action, pre-flop ranges of your opponents etc.
I have seen more then several players in CC freeroll who shove pre-flop regardless of their stack. Once or twice they got called, showed a pair, and that pretty much sealed their faith! Who is ever gonna call them knowing that they are showing monster pairs only? they lose too much value playing like that...