Foxwoods $20/$40

[party36master]

UTG plays any two (roughly 90% of hands)
MP1 is too loose pre-flop, but reads cards well and plays ok postflop
MP3 is average player

Hero is in MP2 w/AA (including A diamonds)

3 limpers to me, I raise w/AA, MP3 3 bets, we lose 1 limper, I cap.
4 players to flop, 18 small bets.

Flop: Q, 6, 4 rainbow

I bet, MP3 raises, UTG calls, MP1 calls.
1) call and check-raise turn, or go to 3 town?
I call.

4 players to turn, 13 big bets
Turn: 7, second diamond
2) go through w/the plan to checkraise, or lead out due to the multiple weak draws, and not wanting it checked around?

check to me, I bet, MP3 calls, UTG calls, MP1 raises
3) call or fold? I call, getting 18:1 w/expectation of 2 callers on the turn, and can pick up 2 bets on river if I hit one of my 2 clean outs.