SNG's: is tight right early

I play almost exclusively MTT's and SNG HU, so doing SNG's is somewhat new to me (were talking about the $10 buy in level here). I have gotten the best results playing ultra tight early. Folding anything but TT+ and AK, AQ to a raise.

Maybe its just my small sample set, but calling a raise with suited connectors hasnt shown the payoff i thought it might. EVerybody plays so wildly, that im facing a pretty hefty bet to see the turn.

When the blinds are at 50-100 is when i loosen up. Then we play poker, but those first few levels I dont see much payoff, even if I double up, to play looser.

CAn you loosen up as the buy in goes up? General/specific comments?