Middle position - dealt AK offsuit

Everyone either calls the BB or fold and I raise 3 - 4 x BB three others then call.

Flop comes RAGS such as may 3, 6, 8. So therefore I miss. Since in middle position / early I check with 2 others behind me. Someone fires off a big raise I fold.
Since you have 1500-1800 chips and the blinds are only 15/30 I would probably have fired out a decent sized bet to see where I'm at...something like 120-200 - if you get reraised fold, but you may take it right there...you also may get called, in which case you will have to re-evaluate your position on the turn. (I have won many of these situations on the turn by firing out another bet - it seems that some people are willing to pay to see just one more card to see if they hit their draw - and will simply fold to a follow-up turn bet.) By checking to them you told them you are weak, and folding in this case was the best move...you have no reason to call.

But if you are the aggressor they have to try and figure out what you have - and most of the time they are going to think high PP or set with that kind of flop. So the only callers or raiser you will be getting is 3-3, 6-6, 8-8, (K-K or A-A who slow played - they should have PFR themselves) or something like 4-5s or Rippy's 4-7.....by betting you get a lot of information....and quite possibly take it right there.
Pushing with A-K post-flop when you miss this early in a tournament with only 10-15 BB to gain is not a good idea....who is going to call AI with that flop...pretty much only the hands that can beat you. A nice aggressive sized feeler bet is the way to go. Anyway, just my thoughts on the matter - you playing again tonight?