2/4 AQs in pos

don't know anything about opp except he's been very active in his first 10 hands (30/30 or so) and think he can do this because of the limper in the pot that I can widen my range to open.

In hindsight I guess the safe/easy/nitty/passive thing to do is fold this flop 100% and move on, this hand never seems to hit.

If I float I'm doing this because I think he can have many hands in his squeezing range based on the fact that he seems very active in a run-you-over type of way. I'm basically looking for a turn to improve my hand, so that's basically A/Q or a spade, that's 15 outs which is great.

So the spade comes, now what do we do. I can bet and have to stack off if he raises, or I can check behind with possibly 12 ot 15 outs?